Genesis
Romans 4:11
and he was afterward given the mark of circumcision as the stamp of God's acknowledgment of the uprightness based on faith that was his before he was circumcised, so that he should be the forefather of all who, without being circumcised, have faith and so are credited with uprightness,
Romans 4:19-20
His faith did not weaken, although he realized that his own body was worn out, for he was about a hundred years old, and that Sarah was past bearing children.
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