Romans 4:10

And if this be the question, the way to resolve it, is, to consider in what circumstances Abraham was when his faith was thus reckoned to him for righteousness; it was a long time before he was circumcised. The promise to which Abraham's faith had respect, was made to him fourteen years, at least, before his circumcision: compare Genesis 15:2, and Genesis 17:24,25: also see Genesis 16:16. If the blessedness, therefore, of justification was not annexed to circumcision, the Gentiles are no less capable of it than the Jews.