The interpretation timeline
Psalm 118:169 Douay-Rheims

TAU. Let my supplication, O Lord, come near in thy sight: give me understanding according to thy word.

A.D. 430 – 1875 6 witnesses

Patristic

before A.D. 750
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“Let us now hear the words of one praying: since we know who is praying, and we recognise ourselves, if we be not reprobate, among the members of this one praying. "Let my prayer come near in Thy sight, O Lord" (ver. 169): for, "The Lord is nigh unto them that are of a contrite heart." "Give me understanding, according to Thy word." He claimeth a promise. For he saith, "according to Thy word," which is to say, according to Thy promise. For the Lord promised this when He said, "I will inform thee."”
Source
749
A.D.
John of Damascus Patristic
A.D. 676–749
“Obtain the same thing for yourself and strive to advance toward it; for it is able to raise you from earth to heaven. You will not advance in it without preparation or [solely] by chance. First cleanse your soul of every passion and wipe it as clean of every evil as a newly cleansed mirror. Remove far from you every recollection of wrong and anger, which most of all prevents our daily prayers from reaching God. Also remove from your heart the offenses of everyone who has ever sinned against you. Giving wings to your prayer with mercy and compassion for the poor, approach God with fervent tears. Praying in this way you will be able to say with the blessed David, who, although he was king and burdened with countless cares, cleansed his soul of all passions: "I hated and abhorred iniquity, but I loved your law. Seven times a day I praised you because of the judgments of your righteousness." My soul kept your testimonies and I loved them very much. Let my prayer draw near to you, Lord; enable me to understand your word.”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“according to Your word, enable me to understand the words of Your Torah; according to their law and in the order in which they stand.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“I have longed for thy salvation, O Lord,.... For temporal salvation and deliverance from enemies; and for spiritual and eternal salvation by the Messiah; and for the Messiah himself, the author of it: Kimchi interprets it of the salvation of the soul in the world to come; see Psa 119:81; and thy law is my delight; or "delights" (n); his exceeding great delight, as being pure and perfect, holy, just, and good; a transcript of the divine nature, a revelation of the divine will; as in the hands of Christ, his surety and Saviour, who had engaged to fulfil it for him; and as written in his heart; and as delivered from the curse and condemnation of it, through the suretyship engagements of Christ. (n) "deliciae meae", Montanus, Tigurine version.”
Source
1849
A.D.
1774–1849
“Supplication. Hebrew, “cry.” Eusebius reads axioma , “dignity,” which St. Ambrose thinks has been substituted for axiosis , “prayer;” though all our copies of the Septuagint have deesis , (Calmet) a word of the same import. (Haydock)”
1875
A.D.
Keil & Delitzsch Lutheran
1861–1875
“The eightfold Tav. May God answer this his supplication as He has heard his praise, and interest Himself on behalf of His servant, the sheep that is exposed to great danger. The petitions "give me understanding" and "deliver me" go hand-in-hand, because the poet is one who is persecuted for the sake of his faith, and is just as much in need of the fortifying of his faith as of deliverance from the outward restraint that is put upon him. רנּה is a shrill audible prayer; תּחנּה, a fervent and urgent prayer. ענה, prop. to answer, signifies in Psa 119:172 to begin, strike up, attune (as does ἀποκρίνεσθαι also sometimes). According to the rule in Psa 50:23 the poet bases his petition for help upon the purpose of thankful praise of God and of His word. Knowing how to value rightly what he possesses, he is warranted in further supplicating and hoping for the good that he does not as yet possess. The "salvation" for which he longs (תּאב as in Psa 119:40, Psa 119:20) is redemption from the evil world, in which the life of his own soul is imperilled. May then God's judgments (defective plural, as in Psa 119:43, Psa 119:149, which the Syriac only takes a singular) succour him (יעזּרני, not יעזרני). God's hand, Psa 119:173, and God's word afford him succour; the two are involved in one another, the word is the medium of His hand. After this relationship of the poet to God's word, which is attested a hundredfold in the Psalm, it may seem strange that he can say of himself תּעיתי כּשׂה אבד; and perhaps the accentuation is correct when it does not allow itself to be determined by Isa 53:6, but interprets: If I have gone astray - seek Thou like a lost sheep Thy servant. שׂה אבד is a sheep that is lost (cf. אבדים as an appellation of the dispersion, Isa 27:13) and in imminent danger of total destruction (cf. Psa 31:13 with Lev 26:38). In connection with that interpretation which is followed by the interpunction, Psa 119:176 is also more easily connected with what precedes: his going astray is no apostasy; his home, to which he longs to return when he has been betrayed into by-ways, is beside the Lord.”
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.