Treasury of Scripture Knowledge
Now the Lord said to Abram, "Go out from your country, your relatives, and your father's household to the land that I will show you.
"You are the LORD God who chose Abram and brought him forth from Ur of the Chaldeans. You changed his name to Abraham.
So he replied, "Brothers and fathers, listen to me. The God of glory appeared to our forefather Abraham when he was in Mesopotamia, before he settled in Haran,
So Sarah became pregnant and bore Abraham a son in his old age at the appointed time that God had told him.
Yes, sons are a gift from the Lord, the fruit of the womb is a reward.
Abraham named his son -- whom Sarah bore to him -- Isaac.