As it is written, “I have made you a father of many nations.”
This is in the presence of him whom he believed: God, who gives life to the dead, and calls the things that are not, as though they were.
Against hope, Abraham in hope believed, to the end that he might become a father of many nations, according to that which had been spoken, “So will your offspring be.”
Without being weakened in faith, he didn’t consider his own body, already having been worn out, (he being about a hundred years old), and the deadness of Sarah’s womb.