Genesis 17:11 in the King James Version
And ye shall circumcise the flesh of your foreskin; and it shall be a token of the covenant betwixt me and you.
Context
10 This is my covenant, which you shall keep, between me and you and your offspring after you. Every male among you shall be circumcised.
11 You shall be circumcised in the flesh of your foreskin. It will be a token of the covenant between me and you.
12 He who is eight days old shall be circumcised among you, every male throughout your generations, he who is born in the house, or bought with money from any foreigner who is not of your offspring.