Bible Verses About Insanity: Feigned by David

He changed his behavior before them, and pretended to be mad in their hands, and scrabbled on the doors of the gate, and let his spittle fall down on his beard.

Then Achish said to his servants, “Look, you see the man is mad. Why then have you brought him to me?

Do I lack madmen, that you have brought this fellow to play the madman in my presence? Shall this fellow come into my house?”