Genesis 26:29-31

that you will not harm us, just as we have not touched you and have done nothing but good to you and have sent you away in peace. You are now the blessed and favored of the LORD!’ ” Then Isaac held a [formal] banquet (covenant feast) for them, and they ate and drank. They got up early in the morning and swore oaths [pledging to do nothing but good to each other]; and Isaac sent them on their way and they left him in peace.