Genesis 21:2-4

Complete Jewish Bible

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.