Luke 2:21
When the eight days until His circumcision had passed, He was named Jesus, the name the angel had given Him before He had been conceived.

Genesis 17:12
Generation after generation, every male must be circumcised when he is eight days old, including those born in your household and those purchased from a foreigner--even those who are not your offspring.

Genesis 21:3, 4
And Abraham gave the name Isaac to the son Sarah bore to him. . . .

Leviticus 12:3
And on the eighth day the flesh of the boy's foreskin is to be circumcised.

Acts 7:8
Then God gave Abraham the covenant of circumcision, and Abraham became the father of Isaac and circumcised him on the eighth day. And Isaac became the father of Jacob, and Jacob of the twelve patriarchs.

Philippians 3:5
circumcised on the eighth day, of the people of Israel, of the tribe of Benjamin; a Hebrew of Hebrews; as to the Law, a Pharisee;