I will
Genesis 21:13
"And of the son of the maid I will make a nation also, because he is your descendant."
Genesis 16:10
Moreover, the angel of the LORD said to her, "I will greatly multiply your descendants so that they will be too many to count."
Genesis 17:20
"As for Ishmael, I have heard you; behold, I will bless him, and will make him fruitful and will multiply him exceedingly. He shall become the father of twelve princes, and I will make him a great nation.
Genesis 25:12-18
Now these are [the records of] the generations of Ishmael, Abraham's son, whom Hagar the Egyptian, Sarah's maid, bore to Abraham;
and these are the names of the sons of Ishmael, by their names, in the order of their birth: Nebaioth, the firstborn of Ishmael, and Kedar and Adbeel and Mibsam
and Mishma and Dumah and Massa,
Hadad and Tema, Jetur, Naphish and Kedemah.
These are the sons of Ishmael and these are their names, by their villages, and by their camps; twelve princes according to their tribes.
These are the years of the life of Ishmael, one hundred and thirty-seven years; and he breathed his last and died, and was gathered to his people.
They settled from Havilah to Shur which is east of Egypt as one goes toward Assyria; he settled in defiance of all his relatives.
1 Chronicles 1:29-31
These are their genealogies: the firstborn of Ishmael [was] Nebaioth, then Kedar, Adbeel, Mibsam,
Mishma, Dumah, Massa, Hadad, Tema,
Jetur, Naphish and Kedemah; these [were] the sons of Ishmael.