Genesis 21:1-6 CJB

1 ADONAI remembered Sarah as he had said, and ADONAI did for Sarah what he had promised.
2 Sarah conceived and bore Avraham a son in his old age, at the very time God had said to him.
3 Avraham called his son, born to him, whom Sarah bore to him, Yitz'chak.
4 Avraham circumcised his son Yitz'chak when he was eight days old, as God had ordered him to do.
5 Avraham was one hundred years old when his son Yitz'chak [laughter] was born to him.
6 Sarah said, "God has given me good reason to laugh; now everyone who hears about it will laugh with me."