'Sand of the Sea' in the Bible

Their widows are more numerous about Me than the sand of the seas; I have brought on them, against a mother of a young man, a ravager at noonday; I have caused anguish and terror to fall on her suddenly.

As the host of the heavens cannot be numbered, nor the sand of the sea measured, so I will multiply the seed of David My servant and the Levites who minister to Me.