1 Samuel 26:21 KJV
Then said Saul, I have sinned: return, my son David: for I will no more do thee harm, because my soul was precious in thine eyes this day: behold, I have played the fool, and have erred exceedingly.
1 Samuel 26:21, King James Version
In context
20 Now therefore, let not my blood fall to the earth before the face of the Lord: for the king of Israel is come out to seek a flea, as when one doth hunt a partridge in the mountains.
21 Then said Saul, I have sinned: return, my son David: for I will no more do thee harm, because my soul was precious in thine eyes this day: behold, I have played the fool, and have erred exceedingly.
22 And David answered and said, Behold the king’s spear! and let one of the young men come over and fetch it.