Romans 4:18-22

And he believed, with a hope beyond hope, so that he might become the father of many nations, according to what was said to him: "Thus shall your posterity shall be." And he was not weakened in faith, nor did he consider his own body to be dead (though he was then almost one hundred years old), nor the womb of Sarah to be dead. And then, in the Promise of God, he did not hesitate out of distrust, but instead he was strengthened in faith, giving glory to God, knowing most fully that whatever God has promised, he is also able to accomplish. And for this reason, it was reputed to him unto justice.