1 Samuel 21:13-15

ACV(i) 13 And he changed his behavior 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. 14 Then Achish said to his servants, Lo, ye see the man is mad. Why then have ye brought him to me? 15 Do I lack madmen, that ye have brought this fellow to play the madman in my presence? Shall this fellow come into my house?