When Isaac was forty years old, he married Rebekah, who came from Northwest Mesopotamia. She was Bethuel’s daughter and the sister of Laban the Aramean.
God made an agreement with Abraham, the sign of which was circumcision. And so when Abraham had his son Isaac, Abraham circumcised him when he was eight days old. Isaac also circumcised his son Jacob, and Jacob did the same for his sons, the twelve ancestors of our people.