The interpretation timeline
2 Samuel 18:17 Douay-Rheims

And they took Absalom, and cast him into a great pit in the forest, and they laid an exceeding great heap of stories upon him: but all Israel fled to their own dwellings.

A.D. 397 – 1875 7 witnesses

Patristic

before A.D. 750
397
A.D.
Ambrose of Milan Patristic
A.D. 339–397
“And what shall I say of Peter who at the sixth hour went up upon the house-top, and there learnt the mystery of the baptism of the Gentiles. But the homicide Absalom had reared for himself a pillar in the King's dale, and then, after his death, he was cast into a great pit. So then the saints ascend unto the Lord, the wicked descend to crime; the saints are on the mountains, the wicked in the valleys; For God is the God of the hills, not of the plains.”
Source
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“But they, as we have sometimes said before in other places, do not charge themselves with what they do to us; while, on the other hand, they charge us with what they do to themselves. For which of our party is there who would desire, I do not say that one of them should perish but should even lose any of his possessions? But if the house of David could not earn peace on any other terms except that Absalom his son should have been slain in the war which he was waging against his father, although he had most carefully given strict injunctions to his followers that they should use their utmost endeavors to preserve him alive and safe, that his paternal affection might be able to pardon him on his repentance, what remained for him except to weep for the son that he had lost and to console himself in his sorrow by reflecting on the acquisition of peace for his kingdom?”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And they took Absalom, and cast him into a great pit in the wood,.... In the wood of Ephraim, near to which the battle was fought, and into which Absalom fled, and where he was slain: and laid a very great heap of stones upon him: his punishment was very exemplary; he was first hanged on an oak, and then thrust through with darts, and swords, and then covered with stones, Sa2 18:9, pointing to the death that a rebellious son, according to the law, ought to die, Deu 21:21; though this might be done in honour of him as a king's son; for such "tumuli", or heaps of stones or earth, were used by the ancients as sepulchral monuments, and the larger the more honourable (n); See Gill on Jos 7:26 and See Gill on Jos 8:29, and all Israel fled everyone to his tent; or to his city, as the Targum; everyone returned to their own house, and to their own business, and so the rebellion ceased. (n) Homer. Iliad. 23. ver. 245, 257.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“And laid a very great heap of stones - This was the method of burying heroes, and even traitors, the heap of stones being designed to perpetuate the memory of the event, whether good or bad. The ancient cairns or heaps of stones, in different parts of the world, are of this kind. The various tumuli or barrows in England are the same as the cairns in different parts of Ireland and Scotland. In the former, stones were not plenty; hence they heaped up great mounds of earth.”
Source
1849
A.D.
1774–1849
“Him. Thus was the law executed upon Absalom, Deuteronomy xxi. 18. (St. Jerome) (Menochius) — History scarcely affords a more detestable character; and his punishment was no less terrible than instructive. He was a figure of the Jews persecuting Jesus Christ, while he gave his blood for the redemption of these his enemies, and prayed for them. As they continued obdurate, they were held up as objects of horror both to heaven and to all nations, like Absalom suspended on the tree, and rejected by heaven and earth. (Calmet)”
Source
1871
A.D.
1871
“they took Absalom, and cast him into a great pit . . . and laid a very great heap of stones upon him--The people of the East indicate their detestation of the memory of an infamous person by throwing stones at the place where he is buried. The heap is increased by the gradual accumulation of stones which passers-by add to it.”
Source
1875
A.D.
Keil & Delitzsch Lutheran
1861–1875
“But Absalom they cast into a great pit in the wood, and threw up over him a very large heap of stones, as an ignominious monument, like those thrown up over Achan (Jos 7:26) and the king of Air (Jos 8:29). This was the end of Absalom and his rebellion. "All Israel (that had crowded round him) had fled, every one to his tent" (i.e., home: see at Deu 16:7).”
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.