1 Samuel 29:2-3

2As the Philistine lords were proceeding ahead of their hundreds and thousands, David and his men were bringing up the rear with Achish.

3Then the Philistine commanders said, “What are these Hebrews doing here?” Achish said to the Philistine commanders, “No! That’s David, servant of Israel’s King Saul—he’s been with me today for over a year, and I’ve not found any fault in him since the day he defected to me until now.”