Genesis 17:20

Moreover, the angel of Yahweh said to her, “I will greatly multiply your seed so that they will be too many to be counted.”

These are the sons of Ishmael and these are their names, by their villages, and by their camps; twelve princes according to their tribes.

“May God Almighty bless you and make you fruitful and multiply you, that you may become an assembly of peoples.

Also He blesses them and they multiply greatly, And He does not let their cattle decrease.

“For this reason Moses has given you circumcision (not because it is from Moses, but from the fathers), and on the Sabbath you circumcise a man.

“And He gave him the covenant of circumcision; and so Abraham was the father of Isaac, and circumcised him on the eighth day; and Isaac was the father of Jacob, and Jacob of the twelve patriarchs.

But the son by the servant-woman had been born according to the flesh, while the son by the free woman through the promise.