1. The Lord was gracious to Sarah, just as he had said he would be. He did for Sarah what he had promised to do.
2. Sarah became pregnant. She had a son by Abraham when he was old. He was born at the exact time God had promised him.
3. Abraham gave the name Isaac to the son Sarah had by him.
4. When his son Isaac was eight days old, Abraham circumcised him. He did it exactly as God had commanded him.
5. Abraham was 100 years old when his son Isaac was born to him.
6. Sarah said, "God has given laughter to me. Everyone who hears about this will laugh with me."
7. She continued, "Who would have said to Abraham that Sarah would nurse children? But I've had a son by him when he is old."
8. Isaac grew. The time came for his mother to stop nursing him. On that day Abraham had a big dinner prepared.
9. But Sarah saw Ishmael making fun of Isaac. Ishmael was the son Hagar had by Abraham. Hagar was Sarah's servant from Egypt.
10. Sarah said to Abraham, "Get rid of that slave woman. Get rid of her son. The slave woman's son will never have a share of the family's property with my son Isaac."
11. What Sarah said upset Abraham very much. After all, Ishmael was his son.
12. But God said to him, "Do not be so upset about the boy and your servant Hagar. Listen to what Sarah tells you, because your family line will continue through Isaac.
13. I will make the son of your servant into a nation also. I will do it because he is your child."