Genesis 17:11

and ye have circumcised the flesh of your foreskin, and it hath become a token of a covenant between Me and you.

Romans 4:11

and a sign he did receive of circumcision, a seal of the righteousness of the faith in the uncircumcision, for his being father of all those believing through uncircumcision, for the righteousness also being reckoned to them,

Acts 7:8

And He gave to him a covenant of circumcision, and so he begat Isaac, and did circumcise him on the eighth day, and Isaac begat Jacob, and Jacob -- the twelve patriarchs;

Exodus 4:25

and Zipporah taketh a flint, and cutteth off the foreskin of her son, and causeth it to touch his feet, and saith, 'Surely a bridegroom of blood art thou to me;'

Exodus 12:48

And when a sojourner sojourneth with thee, and hath made a passover to Jehovah, every male of his is to be circumcised, and then he doth come near to keep it, and he hath been as a native of the land, but any uncircumcised one doth not eat of it;

Deuteronomy 10:16

and ye have circumcised the foreskin of your heart, and your neck ye do not harden any more;

Joshua 5:3

and Joshua maketh for him knives of flint, and circumciseth the sons of Israel at the height of the foreskins.

1 Samuel 18:25-27

And Saul saith, 'Thus do ye say to David, There is no delight to the king in dowry, but in a hundred foreskins of the Philistines -- to be avenged on the enemies of the king;' and Saul thought to cause David to fall by the hand of the Philistines.

2 Samuel 3:14

And David sendeth messengers unto Ish-Bosheth son of Saul, saying, 'Give up my wife Michal, whom I betrothed to myself with a hundred foreskins of the Philistines.'

Treasury of Scripture Knowledge

Summary

And ye shall circumcise the flesh of your foreskin; and it shall be a token of the covenant betwixt me and you.

Bible References

The flesh

Exodus 4:25
and Zipporah taketh a flint, and cutteth off the foreskin of her son, and causeth it to touch his feet, and saith, 'Surely a bridegroom of blood art thou to me;'
Joshua 5:3
and Joshua maketh for him knives of flint, and circumciseth the sons of Israel at the height of the foreskins.
1 Samuel 18:25
And Saul saith, 'Thus do ye say to David, There is no delight to the king in dowry, but in a hundred foreskins of the Philistines -- to be avenged on the enemies of the king;' and Saul thought to cause David to fall by the hand of the Philistines.
2 Samuel 3:14
And David sendeth messengers unto Ish-Bosheth son of Saul, saying, 'Give up my wife Michal, whom I betrothed to myself with a hundred foreskins of the Philistines.'
Exodus 4:25
and Zipporah taketh a flint, and cutteth off the foreskin of her son, and causeth it to touch his feet, and saith, 'Surely a bridegroom of blood art thou to me;'
Joshua 5:3
and Joshua maketh for him knives of flint, and circumciseth the sons of Israel at the height of the foreskins.
1 Samuel 18:25
And Saul saith, 'Thus do ye say to David, There is no delight to the king in dowry, but in a hundred foreskins of the Philistines -- to be avenged on the enemies of the king;' and Saul thought to cause David to fall by the hand of the Philistines.
2 Samuel 3:14
And David sendeth messengers unto Ish-Bosheth son of Saul, saying, 'Give up my wife Michal, whom I betrothed to myself with a hundred foreskins of the Philistines.'

A token

Acts 7:8
And He gave to him a covenant of circumcision, and so he begat Isaac, and did circumcise him on the eighth day, and Isaac begat Jacob, and Jacob -- the twelve patriarchs;
Romans 4:11
and a sign he did receive of circumcision, a seal of the righteousness of the faith in the uncircumcision, for his being father of all those believing through uncircumcision, for the righteousness also being reckoned to them,
Acts 7:8
And He gave to him a covenant of circumcision, and so he begat Isaac, and did circumcise him on the eighth day, and Isaac begat Jacob, and Jacob -- the twelve patriarchs;
Romans 4:11
and a sign he did receive of circumcision, a seal of the righteousness of the faith in the uncircumcision, for his being father of all those believing through uncircumcision, for the righteousness also being reckoned to them,

General references

Genesis 9:12
And God saith, 'This is a token of the covenant which I am giving between Me and you, and every living creature that is with you, to generations age-during;
Genesis 21:4
and Abraham circumciseth Isaac his son, being a son of eight days, as God hath commanded him.
Leviticus 12:3
and in the eighth day is the flesh of his foreskin circumcised;
Genesis 9:12
And God saith, 'This is a token of the covenant which I am giving between Me and you, and every living creature that is with you, to generations age-during;
Genesis 21:4
and Abraham circumciseth Isaac his son, being a son of eight days, as God hath commanded him.
Leviticus 12:3
and in the eighth day is the flesh of his foreskin circumcised;