1 Samuel 21:10-15

10So on that day, David escaped from Saul. He went to Gath and he visited King Achish there.

11The servants of King Achish said to him, ‘This man is David, the king of his country! The people sing this song about him when they dance: “Saul has killed thousands of his enemies. But David has killed tens of thousands of his enemies.” ’

12David thought carefully about what King Achish's servants were saying. It caused him to be very afraid of Achish, king of Gath.

13So when David was with them, he pretended to be crazy. He made marks with his fingers on the doors of the city's gate. He let water run out of his mouth and go down his beard.

14King Achish said to his servants, ‘Look at this man! He is completely crazy! Why did you bring him to me?

15I have enough fools around me already. I do not need to see this crazy man as well. Keep him away from my house.’