The interpretation timeline
Isaiah 1:26 Douay-Rheims

And I will restore thy judges as they were before, and thy counsellors as of old. After this thou shalt be called the city of the just, a faithful city.

A.D. 407 – 1875 9 witnesses

Patristic

before A.D. 750
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“For we will not mimic the false prophets who say that most things have been done by them. This is the meaning of "to corrupt," when someone dilutes the wine, or when someone sells something which ought to be given away freely. He seems to me to be both taunting them regarding money and hinting at the fact that they have mingled the things of God with their own things, as I have said. This is the accusation of Isaiah, who says, "Your wine merchants mingle wine with water." Even if this statement were about wine, one would not sin to say it of doctrine as well. He says, "We do not do this, but we offer to you what we have been given, pouring out the undiluted word."”
Source
435
A.D.
John Cassian Patristic
c. A.D. 360–435
“This occurs for the sake of cleansing, however, when he humbles his righteous ones for their small and as it were insignificant sins or because of their proud purity, giving them over to various trials in order to purge away now all the unclean thoughts … which he sees have collected in their inmost being, and in order to submit them like pure gold to the judgment to come, permitting nothing to remain in them that the searching fire of judgment might afterwards find to purge with penal torment.”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“as at first I will appoint for you pious judges. City of Righteousness As in the beginning, righteousness will lodge therein.”
1167
A.D.
Ibn Ezra Jewish
1089–1167
“And I will restore thy judges, etc. When the kingdom of Israel, the ten tribes, with their judges, shall cease here, and the judges of Ahaz shall likewise have gone, Hezekiah will appoint upright judges ; and this is in fact recorded of him. As at first. As in the days of David and Solomon. The ב in כבראשנה is not essential.”
Source
1256
A.D.
Thomas Aquinas Catholic
1225–1274
“How is she become a harlot. Here he shows their sin according to the turning away from justice toward one's neighbor: and concerning this he does three things. First he describes the fault; second he threatens the punishment, at the place, Therefore thus saith the Lord; third, the sequel of the punishment, at the place, And I will restore. Concerning the first, first he reproves the sin of the people; second, the sin of the priest, at thy silver; third, the sin of the prince, at thy princes. In the people he reproves two things, aggravating by comparison to their former state: namely, venality by comparison to their former fidelity: whence, how is she become a harlot? Jer. 2: under every leafy tree and upon every high hill thou didst lie down, a harlot: and cruelty by comparison to justice and judgment, which is the execution of justice. Ps. 93: until justice be turned into judgment. Whence he says: but now murderers. Hosea 4: cursing and lying and killing and theft and adultery have overflowed, and blood hath touched blood. The sin of the priest he reproves in two things. In the corruption of the truth of doctrine: whence he says: thy silver is turned into dross. Ps. 11: the words of the Lord are pure words, silver tried by the fire, proved from the earth, refined seven times. Jer. 5: the prophets have prophesied a lie. Second, in the remission of the severity of discipline, which is signified in the wine: for this is the wine which the Samaritan poured in: Luke 10. Whence he says: thy wine. Ezech. 13: woe to them that sew. Thy princes. Here he reproves the sin of the princes: and first he shows them unfaithful in the execution of their office, in that they carry it out for their own advantage and not that of the people. Amos 6: anointed with the best ointment, drinking wine in bowls. Ezech. 34: woe to the shepherds of Israel, that feed themselves. Should not the flocks be fed by the shepherds? And for this he says, faithless. Second he shows them transgressors in the harboring of evildoers: companions of thieves, by defending them and affording them patronage: Hosea 6: as the throats of robber men, the princes of the priests. Prov. 1: son, walk not with them. Third he shows them corrupted in the receiving of gifts. Below, 5: Woe to you that justify the wicked for gifts, and take away the justice of the just from him. Whence he says: they love gifts — received ones; they follow after — things promised or hoped for. Fourth, he shows them unjust in the repulsion of the poor, saying they judge not for the fatherless. Jer. 5: they have not judged the cause of the widow, they have not directed the cause of the fatherless. Therefore thus saith the Lord. Here he threatens the punishment: and first, of the prelates; second, of the subjects, at and I will turn. Concerning the first he sets down three things. First, the power of the one punishing, in authority, saying, the Lord. Malachi 1: if I be the Lord, where is my fear? saith the Lord. In the multitude of ministers: of hosts. Job 25: is there any numbering of his soldiers? In strength, mighty. Job 9: he is wise in heart and mighty in strength: who hath resisted him, and hath had peace? Second he sets down the will of the one punishing. Ah, namely to them, I will comfort myself, since their punishment will be a consolation. Below, 63: the day of vengeance is in my heart, the year of my recompense is come. Third he sets down the cruelty of the punishment: at and I will take vengeance on my enemies: as if to say: I will punish you as enemies. Deut. 32: I will render vengeance to my enemies, and repay them that hate me. And I will turn. Here he threatens the punishment of the subjects. And first is set down the preparation of the one punishing, at and I will turn my hand upon thee to punish thee, which, in sparing, I had held as it were folded up. Job 19: the hand of the Lord hath touched me. Second, the completion of the punishment: I will melt away, by the fire of tribulation, to the pure, until whatever is to be purged is purged. Matt. 5: thou shalt not go out from thence till thou repay the last farthing. Third, the multitude of punishments: I will take away all thy tin: because for every sin, below, 40: she hath received of the hand of the Lord double for all her sins. And I will restore. Here he sets down the sequel of the punishment: and first, as regards those corrected, renewal; second, as regards the obstinate, consumption, at and he shall crush. For by the same fire (as Augustine says) gold is proved, and straw smokes. Concerning the first he does three things. First he promises renewal as regards the amendment of the prelates; second, as regards the restoration of good name, at after this thou shalt be called; third, as regards the observance of justice, at Zion in judgment. He says therefore: I will restore the judges, as regards the secular princes, whose office it is to judge the people, and thy counsellors, that is, the priests, whose office it is to minister the counsels of God to the peoples: Malachi 2: the lips of the priests keep knowledge, and they seek the law at his mouth: because he is the angel of the Lord of hosts: as they were before, as Moses and Joshua, who pleased God. Jer. 3: I will give you pastors according to my own heart, and they shall feed you with knowledge and doctrine. And thou shalt be called, that is, thou shalt recover thy fame, so that thou art called such as thou wast before, the city of the just, that is, in which justice is kept. Below, 62: thou shalt no more be called Forsaken, neither shalt thou any more be called Desolate; but thou shalt be called My will is in her. Zion in judgment, through the execution of justice, shall be redeemed, from those who wrong her; and they shall bring her back in justice; for judgment is to bring back to equality, in which justice consists. Ps. 71: to judge thy people with justice, and thy poor with judgment. Jer. 23: a king shall reign (...) and shall do justice and judgment in the land. And he shall crush. Here is set down the destruction of the obstinate; and concerning this he does three things. First he foretells the destruction; second, the manner of the destruction, at they shall be confounded; third, he takes away the hope of escape, at and thy strength shall be. And since the punishment is ordered against the fault, therefore concerning the first he touches on the fault in two ways. On the part of turning, as regards the crime of idolatry: whence he says, the wicked; and as regards the sin of pleasure and luxury: whence he says, sinners: because men are most prone to such things; against which he ordains the punishment of crushing, wherein a punishment is marked out to match the wrong inflicted. Jer. 17: crush them with a double destruction; as it were for a double sin. Second, on the part of turning away, because they have forsaken the Lord; against which he ordains the punishment of consumption, saying, they shall be consumed; in which he designates the punishment of desertion: for what is consumed goes into nothing, and all things would fall into nothing, unless the hand of the Lord held them together; as Gregory says. Jer. 17: O Lord, all that forsake thee shall be confounded: they that depart from thee shall be written in the earth: because they have forsaken the vein of living waters, the Lord. They shall be confounded. Here he sets down the manner of the destruction: and first, as regards the confusion of sin; second, as regards the taking away of good, at when you shall be. Concerning the first, against idolatry he ordains confusion, saying: they shall be confounded for the idols, that is, on account of the idols. Ps. 96: let them all be confounded that adore graven things: against pleasure, shame, when he says: you shall be ashamed of the gardens, that is, of the pleasurable places, which you had chosen, of your luxury. Rom. 6: what fruit had you in those things, of which you are now ashamed? For confusion regards more the evil; but shame regards the fault. For carnal sins (as Gregory says) are of lesser fault and greater infamy. And the reason is, that they are according to the baser powers, and most material ones: and yet they are innate and connatural and subject to passion. When you shall be. Here is set down the taking away of good: and first, of that which pertains to protection and adornment, which is signified in the taking away of leaves; second, of that which pertains to fruit, at as a garden without water, barren. And in contrast it is said of the just man, Ps. 1: he shall be as a tree which is planted near the running waters. And it shall be. Here he takes away from them the hope of escape: and he sets down three things. First he takes away from them the support of their own strength: whence he says: thy strength shall be as the ash of tow, which is quickly consumed. Ecclus. 21: the congregation of sinners is like tow heaped together. Second, the help of idols, saying: your work, namely of idols, which your hands have wrought, as a spark, which is of no consequence. Deut. 32: where are their gods, in whom they trusted? And yet it is burnt up: whence follows, and it shall be kindled. Below, 50: walk in the light of your fire. Third, the help of men: and there shall be none to quench it. Ezech. 20: the flame of the kindling shall not be quenched, and every face shall be burnt in it, from the south even to the north; and all flesh shall see.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And I will restore thy judges as at the first,.... This refers not to the times after the Babylonish, captivity, when the Jews had judges and rulers, such as Zerubbabel and Nehemiah, as they had in the times of Moses, Joshua, and the judges, or as in the times of David and Solomon; but it refers, as Kimchi observes, to the times of the Messiah; and is true of the apostles of Christ, who were set on twelve thrones, had power and authority from Christ to preach his Gospel, and to judge the twelve tribes of Israel in a doctrinal way, Mat 19:28 for which they were abundantly qualified, having the spirit of counsel and of judgment resting upon them, as the prophets of old; and will be again verified in the ministers of the Gospel, at the time of the Jews' conversion, when the watchmen shall see eye to eye, have a clear discerning and judgment of things as at the first, Isa 52:8. and thy counsellors as at the beginning; which is to be understood of the same persons; the apostles at Jerusalem gave advice and counsel in matters of difficulty, and were consulted on special occasions, of which there is an instance in Act 15:1 and ordinary ministers of the word are qualified, and especially will be in the latter day, to give advice both to sensible sinners, inquiring the way of salvation, and to saints when under desertion, and have lost their beloved, or have any matters of difficulty upon them, whether with respect to faith or practice. Afterward thou shall be called the city of righteousness: when many shall be converted through the hand of the Lord turned upon them, and become incorporated into a church state, and having the apostles and other ministers of the Gospel among them, with proper officers over them, as the first Christian church at Jerusalem had; and the members of it were righteous persons, such as were justified by the righteousness of Christ, and lived righteously, walking in the ordinances of the Lord, and as became the Gospel of Christ, and will be the case of the churches of Christ in the latter day: the faithful city; to Christ, his Gospel, ordinances, and one another, as the first Christians at Jerusalem were; see Act 2:12. A true church of Christ is a congregation of faithful men, who keep the ordinances as they were delivered; stand first in the faith of the Gospel; take care that the laws of Christ's house are put in execution; and do not suffer sin upon one another, nor bear them that are evil, whether in doctrine or practice; and which in the latter day will be the case of the churches of Christ in a remarkable manner, when they will justly bear this character.”
Source
1849
A.D.
1774–1849
“Judges. The Jews explain this of the judges, and priests, who governed after the captivity; though it refer rather to the apostles, &c. (St. Jerome) (Worthington)”
1871
A.D.
1871
“As the degeneracy had shown itself most in the magistrates (Isa 1:17-23), so, at the "restoration," these shall be such as the theocracy "at the first" had contemplated, namely, after the Babylonish restoration in part and typically, but fully and antitypically under Messiah (Isa 32:1; Isa 52:8; Jer 33:7; Mat 19:28). faithful--no longer "an harlot."”
Source
1875
A.D.
Keil & Delitzsch Lutheran
1861–1875
“As the threat couched in the previous figure does not point to the destruction, but simply to the smelting of Jerusalem, there is nothing strange in the fact that in Isa 1:26 it should pass over into a pure promise; the meltingly soft and yearningly mournful termination of the clauses with ayich, the keynote of the later songs of Zion, being still continued. "And I will bring back thy judges as in the olden time, and thy counsellors as in the beginning; afterwards thou wilt be called city of righteousness, faithful citadel." The threat itself was, indeed, relatively a promise, inasmuch as whatever could stand the fire would survive the judgment; and the distinct object of this was to bring back Jerusalem to the purer metal of its own true nature. But when that had been accomplished, still more would follow. The indestructible kernel that remained would be crystallized, since Jerusalem would receive back from Jehovah the judges and counsellors which it had had in the olden flourishing times of the monarchy, ever since it had become the city of David and of the temple; not, indeed, the very same persons, but persons quite equal to them in excellence. Under such God-given leaders Jerusalem would become what it had once been, and what it ought to be. The names applied to the city indicate the impression produced by the manifestation of its true nature. The second name is written without the article, as in fact the word kiryah (city), with its massive, definite sound, always is in Isaiah. Thus did Jehovah announce the way which it had been irrevocably determined that He would take with Israel, as the only way to salvation. Moreover, this was the fundamental principle of the government of God, the law of Israel's history.”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.