Genesis 26:29-31

Swear that you will not harm us, just as we have never troubled you. We have always treated you well, and we sent you away from us in peace. And now look how the LORD has blessed you!” So Isaac prepared a covenant feast to celebrate the treaty, and they ate and drank together. Early the next morning, they each took a solemn oath not to interfere with each other. Then Isaac sent them home again, and they left him in peace.