1 Samuel 21:14-16 New American Bible, Revised Edition (NABRE)

14. So, he feigned insanity in front of them and acted like a madman in their custody, drumming on the doors of the gate and drooling onto his beard.

15. Finally Achish said to his servants: “You see the man is mad. Why did you bring him to me?

16. Do I not have enough madmen, that you bring this one to rant in my presence? Should this fellow come into my house?”

1 Samuel 21