Look at Abraham, your ancestor, and Sarah, who gave birth to your ancestors. Abraham had no children when I called him, but I blessed him and gave him many descendants.
The tribe of Judah was counted; all the men twenty years old or older who were able to serve in the army were listed by name with their families and family groups.
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.
He was too old to have children, and Sarah could not have children. It was by faith that Abraham was made able to become a father, because he trusted God to do what he had promised.