Genesis 21:1-8

1Then Adonai visited Sarah just as He had said, and Adonai did for Sarah just as He had spoken.

2So Sarah became pregnant and gave birth to a son for Abraham in his old age, at the appointed time that God had told him.

3Abraham named his son who was born to him—whom Sarah bore for him—Isaac.

4Then Abraham circumcised Isaac, his eight-day-old son, just as God had commanded him.

5Abraham was 100 years old when Isaac his son was born to him.

6So Sarah said, “God has made laughter for me! Everyone who hears will laugh with me.”

7She also said, “Who would have said to Abraham, ‘Sarah has nursed children’? For I have given birth to a son in his old age!”

8The child grew and was weaned—Abraham made a big feast on the day Isaac was weaned.