1 Samuel 26:21 in the King James Version
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.
Context
20 Now therefore, don’t let my blood fall to the earth away from the presence of the LORD; for the king of Israel has come out to seek a flea, as when one hunts a partridge in the mountains.”
21 Then Saul said, “I have sinned. Return, my son David; for I will no more do you harm, because my life was precious in your eyes today. Behold, I have played the fool, and have erred exceedingly.”
22 David answered, “Behold the spear, O king! Let one of the young men come over and get it.