The interpretation timeline
Psalm 131:8 Douay-Rheims

Arise, O Lord, into thy resting place: thou and the ark, which thou hast sanctified.

A.D. 430 – 1849 3 witnesses

Patristic

before A.D. 750
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“"Arise, O Lord, into Your resting place" [Psalm 132:8]. He says unto the Lord sleeping, "Arise." You know already who slept, and who rose again...."You, and the ark of Your sanctification:" that is, Arise, that the ark of Your sanctification, which You have sanctified, may arise also. He is our Head; His ark is His Church: He arose first, the Church will arise also. The body would not dare to promise itself resurrection, save the Head arose first. The Body of Christ, that was born of Mary, has been understood by some to be the ark of sanctification; so that the words mean, Arise with Your Body, that they who believe not may handle.”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“For thy servant David's sake,.... Not for any virtues, or excellencies or merits, of David, literally understood; rather for the sake of the covenant and promises made with him: but for the sake of the antitypical David, the Messiah, the son of David according to the flesh, and the servant of the Lord as Mediator; for whose sake, and in whose name, prayers and supplications are made and presented; turn not away the face of thine anointed; not David; rather Solomon, as the Targum expresses it; so Jarchi: but any of the Lord's anointed, every Christian, or believer in Christ, is an anointed one; and has received the unction from the Holy One, the oil of true grace. And the request is, that God would not turn such away from him, and cause them to depart from his throne of grace, ashamed and disappointed; but hear and answer their petitions, for his Son's sake. In Ch2 6:42; it is added, "remember the mercies of David thy servant"; the kind and good things promised to him, and perform them.”
Source
1849
A.D.
1774–1849
“Sanctified. Hebrew, “ark of thy strength,” which title proceeds from the sanctity of God, who resides there, 1 Kings vi. 20. Our heart ought to be his resting place, Isaias lxvi. 2. (Berthier) — Leaving Silo, &c., come into thy temple, with the ark where thou sanctifiest thy people. He contemplates a higher mystery, the coming of the Messias, and his glorious resurrection. (Worthington) — The same words were repeated, when the ark was removed in the desert, and by Solomon, as they might be also by the captives. (Calmet)”
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.