1 Samuel 29:2-3

2As the Philistine leaders were passing in review with their units of hundreds and thousands, David and his men were passing in review behind them with Achish.

3Then the Philistine commanders asked, “What are these Hebrews doing here?” Achish answered the Philistine commanders, “That is David, servant of King Saul of Israel. He has been with me a considerable period of time. From the day he defected until today, I’ve found no fault with him.”