And Abraham circumcised his son Isaac being eight days old, as God had commanded him.
Genesis 17:10-12
10
"This is My covenant, which you shall keep, between Me and you and your descendants after you: every male among you shall be circumcised.
11
"And you shall be circumcised in the flesh of your foreskin, and it shall be the sign of the covenant between Me and you.
12
"And every male among you who is eight days old shall be circumcised throughout your generations, a [servant] who is born in the house or who is bought with money from any foreigner, who is not of your descendants.
Exodus 12:48
"But if a stranger sojourns with you, and celebrates the Passover to the LORD, let all his males be circumcised, and then let him come near to celebrate it; and he shall be like a native of the land. But no uncircumcised person may eat of it.
Leviticus 12:3
'On the eighth day the flesh of his foreskin shall be circumcised.
Deuteronomy 12:32
"Whatever I command you, you shall be careful to do; you shall not add to nor take away from it.
Luke 1:6
They were both righteous in the sight of God, walking blamelessly in all the commandments and requirements of the Lord.
Luke 1:59
And it happened that on the eighth day they came to circumcise the child, and they were going to call him Zacharias, after his father.
Luke 2:21
And when eight days had passed, before His circumcision, His name was [then] called Jesus, the name given by the angel before He was conceived in the womb.
John 7:22
"For this reason Moses has given you circumcision (not because it is from Moses, but from the fathers), and on [the] Sabbath you circumcise a man.
John 7:23
"If a man receives circumcision on [the] Sabbath so that the Law of Moses will not be broken, are you angry with Me because I made an entire man well on [the] Sabbath?
Acts 7:8
"And He gave him the covenant of circumcision; and so [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.