1 Samuel 21:12
King James Version
“And David laid up these words in his heart, and was sore afraid of Achish the king of Gath.”
Context
9And the priest said, The sword of Goliath the Philistine, whom thou slewest in the valley of Elah, behold, it wrapped in a cloth behind the ephod: if thou wilt take that, take for no other save that here. And David said, none like that; give it me.
10And David arose, and fled that day for fear of Saul, and went to Achish the king of Gath.
11And the servants of Achish said unto him, not this David the king of the land? did they not sing one to another of him in dances, saying, Saul hath slain his thousands, and David his ten thousands?
12And David laid up these words in his heart, and was sore afraid of Achish the king of Gath.
13And he changed his behaviour before them, and feigned himself mad in their hands, and scrabbled on the doors of the gate, and let his spittle fall down upon his beard.
14Then said Achish unto his servants, Lo, ye see the man is mad: wherefore have ye brought him to me?
15Have I need of mad men, that ye have brought this to play the mad man in my presence? shall this come into my house?