1 Samuel 24:18 KJV
And thou hast shewed this day how that thou hast dealt well with me: forasmuch as when the Lord had delivered me into thine hand, thou killedst me not.
1 Samuel 24:18, King James Version
In context
17 And he said to David, Thou art more righteous than I: for thou hast rewarded me good, whereas I have rewarded thee evil.
18 And thou hast shewed this day how that thou hast dealt well with me: forasmuch as when the Lord had delivered me into thine hand, thou killedst me not.
19 For if a man find his enemy, will he let him go well away? wherefore the Lord reward thee good for that thou hast done unto me this day.