Genesis 21:4-6

Complete Jewish Bible

⁴ Avraham circumcised his son Yitz’chak when he was eight days old, as God had ordered him to do.

(v) 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.”