1 Samuel 21:13

13 So he changed his behavior before them, and feigned himself mad in their hands, and made marks on the doors of the gate, and let his spittle run down his beard.

1 Samuel 21:13 In-Context

11 And the servants of A'chish said to him, "Is not this David the king of the land? Did they not sing to one another of him in dances, 'Saul has slain his thousands, and David his ten thousands'?"
12 And David took these words to heart, and was much afraid of A'chish the king of Gath.
13 So he changed his behavior before them, and feigned himself mad in their hands, and made marks on the doors of the gate, and let his spittle run down his beard.
14 Then said A'chish to his servants, "Lo, you see the man is mad; why then have you brought him to me?
15 Do I lack madmen, that you have brought this fellow to play the madman in my presence? Shall this fellow come into my house?"
Revised Standard Version of the Bible, copyright 1952 [2nd edition, 1971] by the Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.