4:10 How then was it reckoned? when he was in circumcision, or in uncircumcision? Not in circumcision, but in uncircumcision:
4:11 and he received the sign of circumcision, a seal of the righteousness of the faith which he had while he was in uncircumcision; that he might be the father of all them that believe, though they be in uncircumcision, that righteousness might be reckoned unto them;
4:16 For this cause [it is] of faith, that [it may be] according to grace; to the end that the promise may be sure to all the seed; not to that only which is of the law, but to that also which is of the faith of Abraham, who is the father of us all
4:17 (as it is written, A father of many nations have I made thee) before him whom he believed, [even] God, who giveth life to the dead, and calleth the things that are not, as though they were.
4:18 Who in hope believed against hope, to the end that he might become a father of many nations, according to that which had been spoken, So shall thy seed be.
4:19 And without being weakened in faith he considered his own body now as good as dead (he being about a hundred years old), and the deadness of Sarah's womb;