Genesis 21:2-5

Rotherham(i) 2 So, Sarah, conceived and bare, to Abraham, a son, for his old age,––at the set time, of which God had spoken with him. 3 And Abraham called the name of his son that was born to him, whom, Sarah, bare to him, Isaac. 4 And Abraham circumcised Isaac his son, when eight days old,––as God commanded him. 5 Now Abraham was a hundred years old,––when Isaac his son was born to him.