Genesis 17:11

So shall ye be circumcised in the flesh of your foreskin, - So shall it become a sign of a covenant, betwixt me and you.

Romans 4:11

And, a sign, he received namely of circumcision, a seal of the righteousness of the faith which he had while yet uncircumcised; to the end he might be father of all that believe during uncircumcision, to the end the same righteousness might be reckoned unto them, -

Acts 7:8

And he gave unto him a covenant of circumcision; and, thus, he begat Isaac, and circumcised him on the eighth day, and Isaac, Jacob, and Jacob, the twelve patriarchs.

Exodus 4:25

So Zipporah took a sharp stone and cut off the foreskin of her son, and cast it down at his feet, - and said - Surely, a bridegroom by rites of blood, art thou to me!

Exodus 12:48

And when there may sojourn with thee a sojourner who may wish to keep a passover to Yahweh, there must be circumcised to him every male and then, may he draw near to keep it, so shall he be as a native of the land, - but no uncircumcised male, shall eat thereof.

Deuteronomy 10:16

Therefore must ye circumcise the foreskin of your hearts, - and your necks, must ye stiffen no more.

Joshua 5:3

So Joshua made him knives of flint, - and circumcised the sons of Israel, at the Hill of Foreskins.

1 Samuel 18:25-27

Then said Saul - Thus, shall ye say unto David - The king hath no delight in purchase-price, but rather in a hundred foreskins of Philistines, by avenging himself on the enemies of the king. But, Saul, thought to let David fall by the hand of the Philistines.

2 Samuel 3:14

And David sent messengers unto Ish-bosheth son of Saul, saying, - Give up my wife, Michal, whom I espoused to myself, for a hundred foreskins of 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
So Zipporah took a sharp stone and cut off the foreskin of her son, and cast it down at his feet, - and said - Surely, a bridegroom by rites of blood, art thou to me!
Joshua 5:3
So Joshua made him knives of flint, - and circumcised the sons of Israel, at the Hill of Foreskins.
1 Samuel 18:25
Then said Saul - Thus, shall ye say unto David - The king hath no delight in purchase-price, but rather in a hundred foreskins of Philistines, by avenging himself on the enemies of the king. But, Saul, thought to let David fall by the hand of the Philistines.
2 Samuel 3:14
And David sent messengers unto Ish-bosheth son of Saul, saying, - Give up my wife, Michal, whom I espoused to myself, for a hundred foreskins of Philistines.
Exodus 4:25
So Zipporah took a sharp stone and cut off the foreskin of her son, and cast it down at his feet, - and said - Surely, a bridegroom by rites of blood, art thou to me!
Joshua 5:3
So Joshua made him knives of flint, - and circumcised the sons of Israel, at the Hill of Foreskins.
1 Samuel 18:25
Then said Saul - Thus, shall ye say unto David - The king hath no delight in purchase-price, but rather in a hundred foreskins of Philistines, by avenging himself on the enemies of the king. But, Saul, thought to let David fall by the hand of the Philistines.
2 Samuel 3:14
And David sent messengers unto Ish-bosheth son of Saul, saying, - Give up my wife, Michal, whom I espoused to myself, for a hundred foreskins of Philistines.

A token

Acts 7:8
And he gave unto him a covenant of circumcision; and, thus, he begat Isaac, and circumcised him on the eighth day, and Isaac, Jacob, and Jacob, the twelve patriarchs.
Romans 4:11
And, a sign, he received namely of circumcision, a seal of the righteousness of the faith which he had while yet uncircumcised; to the end he might be father of all that believe during uncircumcision, to the end the same righteousness might be reckoned unto them, -
Acts 7:8
And he gave unto him a covenant of circumcision; and, thus, he begat Isaac, and circumcised him on the eighth day, and Isaac, Jacob, and Jacob, the twelve patriarchs.
Romans 4:11
And, a sign, he received namely of circumcision, a seal of the righteousness of the faith which he had while yet uncircumcised; to the end he might be father of all that believe during uncircumcision, to the end the same righteousness might be reckoned unto them, -

General references

Genesis 9:12
And God said, This, is the sign of the covenant which I am granting betwixt me and you, and every living soul that is with you, - to age-abiding generations: -
Genesis 21:4
And Abraham circumcised Isaac his son, when eight days old, - as God commanded him.
Leviticus 12:3
And, on the eighth day, shall the flesh of his foreskin be circumcised.
Genesis 9:12
And God said, This, is the sign of the covenant which I am granting betwixt me and you, and every living soul that is with you, - to age-abiding generations: -
Genesis 21:4
And Abraham circumcised Isaac his son, when eight days old, - as God commanded him.
Leviticus 12:3
And, on the eighth day, shall the flesh of his foreskin be circumcised.