Romans 4:16-17

That’s why the inheritance comes through faith, so that it will be on the basis of God’s grace. In that way, the promise is secure for all of Abraham’s descendants, not just for those who are related by Law but also for those who are related by the faith of Abraham, who is the father of all of us. As it is written: “ I have appointed you to be the father of many nations. ” So Abraham is our father in the eyes of God in whom he had faith, the God who gives life to the dead and calls things that don’t exist into existence.