Genesis 21:1-9

1 The LORD came to help Sarah and did for her what he had promised.
2 So she became pregnant, and at the exact time God had promised, she gave birth to a son for Abraham in his old age.
3 Abraham named his newborn son Isaac.
4 When Isaac was eight days old, Abraham circumcised him as God had commanded.
5 Abraham was 100 years old when his son Isaac was born.
6 Sarah said, "God has brought me laughter, and everyone who hears about this will laugh with me.
7 Who would have predicted to Abraham that Sarah would nurse children? Yet, I have given him a son in his old age."
8 The child grew and was weaned. On the day Isaac was weaned, Abraham held a big feast.
9 Sarah saw that Abraham's son by Hagar the Egyptian was laughing at Isaac.
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