Cross References → 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.

when he is eight days old

Genesis 21:4
When his son Isaac was eight days old, Abraham circumcised him, as God had commanded him.
Leviticus 12:3
And on the eighth day the flesh of the boy’s foreskin is to be circumcised.
Luke 1:59
On the eighth day, when they came to circumcise the child, they were going to name him after his father Zechariah.
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.
John 7:22-23
But because Moses gave you circumcision, you circumcise a boy on the Sabbath (not that it is from Moses, but from the patriarchs.) If a boy can be circumcised on the Sabbath so that the law of Moses will not be broken, why are you angry with Me for making the whole man well on the Sabbath?
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.
Romans 2:28
A man is not a Jew because he is one outwardly, nor is circumcision only outward and physical.
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;

born in your household

Genesis 17:23
On that very day Abraham took his son Ishmael and all those born in his household or purchased with his money—every male among the members of Abraham’s household—and he circumcised them, just as God had told him.
Exodus 12:48-49
If a foreigner resides with you and wants to celebrate the LORD’s Passover, all the males in the household must be circumcised; then he may come near to celebrate it, and he shall be like a native of the land. But no uncircumcised man may eat of it. The same law shall apply to both the native and the foreigner who resides among you.”