Genesis 26:26-31

Then Abimelech came to him from Gerar with his adviser Ahuzzath and Phicol the commander of his army. Isaac said to them, “Why have you come to me, since you hate me and have sent me away from you?” They said, “We see plainly that the LORD has been with you; so we said, ‘Let there now be an oath between us, even between you and us, and let us make a covenant with you, that you will do us no harm, just as we have not touched you and have done to you nothing but good and have sent you away in peace. You are now the blessed of the LORD.’ ” Then he made them a feast, and they ate and drank. In the morning they arose early and exchanged oaths; then Isaac sent them away and they departed from him in peace.