Genesis
Romans 4:11
Before, not after. And he received circumcision as a sign, a mark attesting the reality of the faith-righteousness which was his while still uncircumcised, that he might be the forefather of all those who believe even though they are uncircumcised--in order that this righteousness might be placed to their credit;
Romans 4:19-20
And, without growing weak in faith, he could contemplate his own vital powers which had now decayed--for he was nearly 100 years old--and Sarah's barrenness.
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