Genesis 17:11
And you shall circumcise the flesh of your foreskin; and it shall be a token of the covenant between me and you.
Nave's Topical Index

Romans 4:11
And he received the sign of circumcision, a seal of the righteousness of the faith which he had yet being uncircumcised: that he might be the father of all them that believe, though they be not circumcised; that righteousness might be imputed to them also:
Nave's Topical Index

Of the Sacraments.
... 12), he says that they were not partakers of circumcision. ... They add similitudes,
in order to make the matter more ... a ring, so we wear our symbols to distinguish ...
/.../the institutes of the christian religion/chapter 14 of the sacraments.htm

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