Romans 4:16-17

Because of this, it is from faith according to grace that the Promise is ensured for all posterity, not only for those who are of the law, but also for those who are of the faith of Abraham, who is the father of us all before God, in whom he believed, who revives the dead and who calls those things that do not exist into existence. For it is written: "I have established you as the father of many nations."