מדרש על שמואל ב 23:21

And Abraham rebuked Avimelech: R. Yosi ben R. Hanina said: Rebuke leads to love, as it says, rebuke a wise man and he will love you. Such indeed is R. Yosi ben Hanina’s view, for he said: Love unaccompanied by rebuke is not love. Resh Lakish said: Rebuke leads to peace; hence, ‘And Abrahman reproved Avimelech’. Such is his view, for he said: Peace unaccompanied by rebuke is not peace.