Romans 4:11
Afterward he received the mark of circumcision as God's seal of his right standing with Him on condition of faith which he had before he was circumcised, that he might be the forefather of all who have faith while still uncircumcised, that they might have their faith credited to them as right standing with God;
Romans 4:19-20
Because he never weakened in faith, he calmly contemplated his own vital powers as worn out (for he was about one hundred years old) and the inability of Sarah to bear a child,
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