Genesis 21:2-4

New King James Version

² For Sarah ^(A)conceived and bore Abraham a son in his old age, ^(B)at the set time of which God had spoken to him. ³ And Abraham called the name of his son who was born to him—whom Sarah bore to him—^(C)Isaac.^{[a] 4} Then Abraham ^(D)circumcised his son Isaac when he was eight days old, ^(E)as God had commanded him.