1 Samuel 29:2-3

2The Philistine rulers marched out with their groups of soldiers. They were in groups of 100 soldiers and 1,000 soldiers. David and his men were marching with King Achish at the back of the army.

3The Philistine leaders asked, ‘Why are these Hebrew people here?’ Achish said to them, ‘This is David. He was the servant of Israel's King Saul. But he came to me more than a year ago. Since he turned against King Saul and came to me, he has always been faithful to me.’