Then Saul replied, “I have sinned. Come back, David my son. I will never harm you again, because today you considered my life precious. I have played the fool and have committed a grave error!”
Jewish Publication Society of America Version (JPS1917) - 1 Samuel 26:21 >Then said Saul: 'I have sinned; return, my son David; for I will no more do thee harm, because my life was precious in thine eyes this day; behold, I have played the fool and erred exceedingly.'