Musar על בראשית 21:25

והוכיח אברהם את אבימלך . Rabbi Yossi in the name of Rabbi Chaninah says that admonition eventually produces a feeling of love for the one who admonishes. We know this from Proverbs 9,8: "Admonish the wise and he will love you." Rabbi Yossi firmly believed that any "peace" that does not include admonition is no true peace (Bereshit Rabbah 54,3).