Romans 4:11

He received the sign of circumcision as a seal [confirming] that he had been [considered] righteous because of the faith he had before being circumcised. Thus, he became the [spiritual] father of all people who believe [in God], even though they have not been circumcised, so that they could be considered righteous [by their faith].

Acts 7:8

And God gave Abraham the Agreement which required circumcision [as an identifying mark] so when Abraham fathered Isaac he circumcised him when he was eight days old. Then Isaac had a son, Jacob; and Jacob had [as sons] the twelve patriarchs [i.e., ruling fathers of families].

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

A token

Acts 7:8
And God gave Abraham the Agreement which required circumcision [as an identifying mark] so when Abraham fathered Isaac he circumcised him when he was eight days old. Then Isaac had a son, Jacob; and Jacob had [as sons] the twelve patriarchs [i.e., ruling fathers of families].
Romans 4:11
He received the sign of circumcision as a seal [confirming] that he had been [considered] righteous because of the faith he had before being circumcised. Thus, he became the [spiritual] father of all people who believe [in God], even though they have not been circumcised, so that they could be considered righteous [by their faith].
Acts 7:8
And God gave Abraham the Agreement which required circumcision [as an identifying mark] so when Abraham fathered Isaac he circumcised him when he was eight days old. Then Isaac had a son, Jacob; and Jacob had [as sons] the twelve patriarchs [i.e., ruling fathers of families].
Romans 4:11
He received the sign of circumcision as a seal [confirming] that he had been [considered] righteous because of the faith he had before being circumcised. Thus, he became the [spiritual] father of all people who believe [in God], even though they have not been circumcised, so that they could be considered righteous [by their faith].