Genesis 21:3 in the King James Version
And Abraham called the name of his son that was born unto him, whom Sarah bare to him, Isaac.
Context
2 Sarah conceived, and bore Abraham a son in his old age, at the set time of which God had spoken to him.
3 Abraham called his son who was born to him, whom Sarah bore to him, Isaac.
4 Abraham circumcised his son, Isaac, when he was eight days old, as God had commanded him.