The interpretation timeline
Psalm 118:164 Douay-Rheims

Seven times a day I have given praise to thee, for the judgments of thy justice.

A.D. 397 – 1849 6 witnesses 7 excerpts

Patristic

before A.D. 750
397
A.D.
Ambrose of Milan Patristic
A.D. 339–397
“Frequent prayer also commends us to God. For if the prophet says, "Seven times a day have I praised you," though he was busy with the affairs of a kingdom, what ought we to do, who read, "Watch and pray that you enter not into temptation"? Certainly our customary prayers ought to be said with giving of thanks, when we rise from sleep, when we go forth, when we prepare to receive food, after receiving it and at the hour of incense, when at last we are going to rest.”
Source
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“Such was, assuredly, the conduct of the Psalmist, who says, "Seven times a day do I praise You, because of Your righteous judgments" [Psalm 119:164]. The words "seven times a day," signify "evermore." For this number is wont to be a symbol of universality; because after six days of the divine work of creation, a seventh of rest was added; [Genesis 2:2] and all times roll on through a revolving cycle of seven days. For no other reason it was said, "a just man falls seven times, and rises up again:" [Proverbs 24:16] that is, the just man perishes not, though brought low in every way, yet not induced to transgress, otherwise he will not be just. For the words, "falls seven times," are employed to express every kind of tribulation, whereby man is cast down in the sight of men: and the words, "rises up again," signify that he profits from all these tribulations. The following sentence in this passage sufficiently illustrates the foregoing words: for it follows, "but the wicked shall fall into mischief." Not to be deprived of strength in any evils, is therefore the falling seven times, and the rising again of the just man. Justly has the Church then praised God seven times in a day for His righteous judgments; because, when it was time that judgment should begin at the house of God, [1 Peter 4:17] she did not faint in all her tribulations, but was glorified with the crowns of Martyrs.”
Source
“The seven loaves signify the sevenfold working of the Holy Spirit; the four thousand people, the church established under the four Gospels; the seven baskets of fragments, the perfection of the church. This number, you see, stands for perfection extremely often. I mean, how come it says, "Seven times a day shall I praise you"? Is a person going wildly astray who does not praise God that number of times? So what else can be the meaning of "seven times a day shall I praise you," but "I shall never cease from praising"? You see, when he says seven times he signifies the whole of time; that is why the ages unfold in the weekly round of seven days. So what else can "seven times a day shall I praise you" mean but his "praise is always in my mouth"?”
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
“Seven times a day In the morning, twice before the reading of “Shema” and once after it, and in the evening, twice before it and twice after it. for Your righteous judgments For the reading of the Shema, which consists of words of Torah.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“TAU.--The Twenty-second and last Part. TAU. Let my cry come near before thee, O Lord,.... Not "my praise", as the Syriac version; but "my prayer", put up in great distress, and with great vehemence and importunity; see Psa 119:145; and when it is desired it might "come near before" the Lord, it does not so much suppose distance of place between the petitioner and the petitioned as earth is from heaven, as Aben Ezra observes, as distance of state and condition; the petitioner being a creature, and a sinful creature, and whose sins had separated between God and him: and now the only way of access is by Christ; prayer can only pass to God through him, who is the only Mediator between God and man; by whom persons and services are brought near unto, him with acceptance. The sum of this request is, that his prayer might not be rejected and shut out; but that it might be admitted, might come up before God, and into his ears, and be regarded by him, and accepted with him; give me understanding according to thy word; meaning not natural, but spiritual understanding; not that he was without any, as natural men are, whose understandings are darkened; for he had a large share of understanding of spiritual things; but he wanted more, he desired to know more of himself, of his wants and weaknesses; to know more of God in Christ, and of Christ, his person, offices, and grace; to know more of the doctrines of the word, and of the duties of religion; and particularly that he might have a better understanding of the business of prayer, and might know both what to pray for, and how to pray as he ought; all which is a gift from God: and he desires in all to be directed "according to the word" of God, the means of enlightening the understanding, and of increasing spiritual knowledge; or else he means the promise of God, that he would give him more knowledge and understanding; that he might be taught of God, and follow on to know him, and increase in every branch of spiritual knowledge.”
Source
1849
A.D.
1774–1849
“Seven. Often, (Worthington) as the word signifies, Proverbs xxiv. 16., &. (Vatable) — Yet here it may determine the precise number, as the Church seems to have taken it, by instituting the seven canonical hours of the day, and matins and lauds for the night, in imitation of the psalmist. (Berthier; ver. 147) — R. Solomon understands it literally, prescribing prayer twice before the reading of the decalogue, and once after in the morning; and in the afternoon, twice before and after the same lecture. The Church has enjoined matins to be said at night, lauds in the morning, prime, tierce, sext, none, vespers and complin, in the course of the day. (St. Benedict, reg. 8., and 16.) (Calmet) — This ecclesiastical office consists of hymns, psalms, &c. (St. Isidore) — Against it some have risen up, particularly against that part which was said in the night, pretending that God had made the night for rest; and hence they were called nuctazontes, or “drowsy” heretics. (St. Isidore, Of. i. 22.) — St. Jerome styles Vigilantius Dormitantius, for the same reason; as if it were better to sleep than to watch. Wycliff (Wald. iii. Tit. iii. 21.) and Luther have oppugned the same holy practice, though it be so conformable to Scripture and to the fathers. (St. Basil, reg. fus. 37.; St. Gregory, dial. iii. 14.; Ven. Bede, Hist. iv. 7., &c.) — St. Clement, as many suppose, (Worthington) or at least some author before the fourth century, (Haydock) explains the reason why we should pray at these set times; but cautions us not to join with heretics, neither in the Church nor at home. (Apostolic Constitutions viii. 40.) — For what society is there between light and darkness? (2 Corinthians vi.) St. Cyprian, (or. Dom.) St. Jerome, (ep. ad Eust.) and St. Augustine (ser. 55. de Temp.) mention several of these hours, and exhort the faithful to be diligent in attending these public prayers. (Worthington)”
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.