1 Samuel 21:10-12

That day David fled from Saul and went to Achish king of Gath. But the servants of Achish said to him, “Isn’t this David, the king of the land? Isn’t he the one they sing about in their dances: “ ‘Saul has slain his thousands, and David his tens of thousands’?” David took these words to heart and was very much afraid of Achish king of Gath.