The interpretation timeline
1 Samuel 24:18 Douay-Rheims

And he said to David: Thou art more just than I: for thou hast done good to me, and I have rewarded thee with evil.

A.D. 379 – 1771 2 witnesses

Patristic

before A.D. 750
379
A.D.
Basil of Caesarea Patristic
c. A.D. 330–379
“Not even this act of benevolence moved Saul, however. Again he gathered an army and again he set out in pursuit, until he was a second time apprehended by David in the cave where he more clearly revealed his own iniquity and made the virtue of David even more resplendent. Envy is the most savage form of hatred. Favors render those who are hostile to us for any other reason more tractable, but kind treatment shown to an envious and spiteful person only aggravates his dislike. The greater the favors he receives, the more displeased and vexed and ill-disposed he becomes.”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And thou hast showed this day how that thou hast dealt well with me,.... The cutting off of the skirt of his robe only, when his life was in his hand, was a clear proof and full demonstration of his dealing well with him, and might sufficiently convince him he had no ill design upon him: forasmuch as when the Lord had delivered me into thine hand, thou killedst me not; this was a plain proof and evidence of his kindness to him, which he owns, and also the providence of God in this affair, which had delivered him into the hands of David; by which he might see the Lord was for David, and against him, and might have deterred him from seeking David's hurt hereafter; but it did not.”
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.