Sarah said, "God has brought me joy and laughter. Everyone who hears about it will laugh with me."

But God said to Abraham, "Don't be worried about the boy and your slave Hagar. Do whatever Sarah tells you, because it is through Isaac that you will have the descendants I have promised.

But God said, "No. Your wife Sarah will bear you a son and you will name him Isaac. I will keep my covenant with him and with his descendants forever. It is an everlasting covenant.

"Take your son," God said, "your only son, Isaac, whom you love so much, and go to the land of Moriah. There on a mountain that I will show you, offer him as a sacrifice to me."

Then I took Abraham, your ancestor, from the land across the Euphrates and led him through the whole land of Canaan. I gave him many descendants. I gave him Isaac,

From Abraham to King David, the following ancestors are listed: Abraham, Isaac, Jacob, Judah and his brothers; then Perez and Zerah (their mother was Tamar), Hezron, Ram, Amminadab, Nahshon, Salmon, Boaz (his mother was Rahab), Obed (his mother was Ruth), Jesse, and King David.

Then God gave to Abraham the ceremony of circumcision as a sign of the covenant. So Abraham circumcised Isaac a week after he was born; Isaac circumcised his son Jacob, and Jacob circumcised his twelve sons, the famous ancestors of our race.

Nor are all of Abraham's descendants the children of God. God said to Abraham, "It is through Isaac that you will have the descendants I promised you."

God had said to him, "It is through Isaac that you will have the descendants I promised."