'Sand of the Sea' in the Bible

Their widows have increased to me above the sand of the seas. I have brought upon them, against the mother of the young men, a destroyer at noonday. I have caused anguish and terrors to fall upon her suddenly.

As the host of heaven cannot be numbered, neither the sand of the sea measured, so I will multiply the seed of David my servant, and the Levites that minister to me.