The interpretation timeline
Psalm 80:13 Douay-Rheims

So I let them go according to the desires of their heart: they shall walk in their own inventions.

A.D. 430 – 1771 3 witnesses

Patristic

before A.D. 750
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“"If My people would have heard Me, if Israel would have walked in My ways" [Psalm 81:13]. For perchance that Israel says, Behold I sin, it is manifest, I go after the affections of my own heart: but what can I do? The devil does this. Demons do this. What is the devil? Who are the demons? Certainly your enemies. "Unto nothing all their enemies I would have brought down; and on them that oppress them I would have sent forth My hand" [Psalm 81:14]. But now what have they to do to complain of enemies? Themselves have become the worse enemies. For how? What follows? Of enemies ye complain, yourselves, what are you?”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“after their heart’s fantasies Heb. בשרירותלבם, after the views of their heart, as (above 5: 9): “because of those who lie in wait for me (שוררי).””

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“I should soon have subdued their enemies,.... The Canaanites, and others: this he would have done in a very little time, or at once, and that easily, and without any trouble; he would quickly have humbled them, and brought them on their knees, as the word (g) signifies, to terms of peace; for when a man's ways please the Lord, he makes his enemies to be at peace with him, Pro 16:7 so those that hearken to the voice of Christ, and walk in his ways, he subdues their iniquities, and will bruise Satan under their feet shortly, and make them more than conquerors: through himself, over the world; the men and things of it he has overcome: and turned my hand against their adversaries; that troubled, distressed, and oppressed them; and it is a righteous thing with God to render tribulation to them that trouble his people; he turns his chastising hand off of them, which sometimes is heavy upon them, and presses them sore, and turns it in a way of wrath and vindictive justice against their adversaries; and so the Targum, "and turned the stroke of my power against their adversaries;'' this is the lighting down of his arm with the indignation of his anger, which is intolerable, Isa 30:30. (g) "flecterem", Cocceius.”
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.