Midrasch zu Bereschit 21:25

For reproof leads to peace. And thus do you find with Abraham, viz. (Bereshith 21:25) "And Abraham reproved Avimelech because of the well, etc." And what is written (of this)? (Ibid. 28) "And the two of them made a covenant." And thus with Israel, viz. (Ibid. 26:27) "And Isaac said to them: Why did you come to me when you hate me and you sent me away from you!" And (Ibid. 31) "And they departed from him in peace."

… And thus (that rebuke leads to peace) do we find with Abraham, viz. (Ibid. 21:28) "And Abraham rebuked Avimelech, etc.", followed by (27) "and the two of them made a covenant." And thus do we find with Isaac, viz. (Ibid. 26:27) "And Isaac said to them: Why have you come to me when you hate me and you sent me away from you?" followed by "… (31) "and Isaac saw them off and they went from him in peace."

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.