Romans 4:18-21

Williams(i) 18 Abraham, building on hope in spite of hopeless circumstances, had faith, and so he actually became the father of many nations, just as it had been told him, "So numberless shall your descendants be." 19 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, 20 and yet he never staggered in doubt at the promise of God but grew powerful in faith, because he gave the glory to God 21 in full assurance that He was able to do what He had promised.