Luke 1:59
A week later they met to circumcise the child, and were about to call him 'Zechariah' after his father,
Luke 2:21
Eight days after the birth of the child, when it was time to circumcise him, he received the name Jesus--the name given him by the angel before his conception.
Philippians 3:5
I was circumcised when eight days old; I am an Israelite by race, and of the tribe of Benjamin; I am a Hebrew, and the child of Hebrews. As to the Law, I was a Pharisee;
Acts 7:8
Then God made with Abraham the Covenant of Circumcision; and under it Abraham became the father of Isaac, and circumcised him when he was eight days old; and Isaac became the father of Jacob; and Jacob of the Twelve Patriarchs.