1 Samuel 24:3-5

Young's Literal Translation

³ and he cometh in unto folds of the flock, on the way, and there [is] a cave, and Saul goeth in to cover his feet; and David and his men in the sides of the cave are abiding.

⁴ And the men of David say unto him, `Lo, the day of which Jehovah said unto thee, Lo, I am giving thine enemy into thy hand, and thou hast done to him as it is good in thine eyes;' and David riseth and cutteth off the skirt of the upper robe which [is] on Saul -- gently.

⁵ And it cometh to pass afterwards that the heart of David smiteth him, because that he hath cut off the skirt which [is] on Saul,