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.(1 Samuel 21:13)

Then said Achish unto his servants, Lo, ye see the man is mad: wherefore then have ye brought him to me?(1 Samuel 21:14)

Have I need of mad men, that ye have brought this fellow to play the mad man in my presence? shall this fellow come into my house?(1 Samuel 21:15)

And every one that was in distress, and every one that was in debt, and every one that was discontented, gathered themselves unto him; and he became a captain over them: and there were with him about four hundred men.(1 Samuel 22:2)

And David went thence to Mizpeh of Moab: and he said unto the king of Moab, Let my father and my mother, I pray thee, come forth, and be with you, till I know what God will do for me.(1 Samuel 22:3)

And he brought them before the king of Moab: and they dwelt with him all the while that David was in the hold.(1 Samuel 22:4)