1 Samuel 29:3 - Matthew Poole's English Annotations on the Holy Bible

The princes of the Philistines; the lords of the other eminent cities and territories, who were confederate with him in this expedition. These days, or these years: q.d. Did I say days ? I might have said years; either because he hath now been with me a full year and four months, 1 Samuel 27:7, or because he was with me some years ago, 1 Samuel 21:10, and since that time hath been known to me. And it is not improbable but David, after his escape from thence, might hold some correspondence with Achish, as finding him to be a man of more generous temper than the rest of the Philistines, and supposing that he might have need of him for a refuge in case Saul continued to seek his life. Since he fell into me, i. e. since he revolted or left his own king to turn to me; for that sense Achish put upon this escape of David, (as it is called 1 Samuel 27:1) and so is the phrase of falling to a party elsewhere used, Jeremiah 37:13,14.