Romans 4:18-20

Goodspeed(i) 18 Abraham, hoping against hope, had faith, and so became the father of many nations, in fulfilment of the Scripture, "So countless shall your descendants be." 19 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. 20 He did not incredulously question God's promise, but his faith gave him power and he praised God