1 Samuel 21:11-13

11And the servants of Achish said to him, β€œIs not this David the king of the land? aDid they not sing to one another of him in dances,

β€˜Saul has struck down his thousands,
and David his ten thousands’?”
12And David btook these words to heart and was much afraid of Achish the king of Gath. 13So he changed his behavior before them and pretended to be insane in their hands and made marks on the doors of the gate and let his spittle run down his beard.
Copyright information for ESV