"Speak to the children of Israel, saying: 'If a woman has conceived and borne a male child, then she shall be defiled seven days; as in the days of her menstruation she shall be defiled.
And on the eighth day the flesh of his foreskin shall be circumcised.
Philippians 3:5
circumcised on the eighth day, of the nation of Israel, of the tribe of Benjamin, a Hebrew of Hebrews, concerning the Torah, a Pharisee;