'Sand of the Sea' in the Bible

“I will make their widows more numerous before MeThan the sand of the seas;I will bring against them, against the mother of the young men,A destroyer at noonday;I will suddenly cause anguish and terrorTo fall on her.

As the host of [the stars of] heaven cannot be counted and the sand of the sea cannot be measured, so I will multiply the descendants of David My servant and the Levites who minister to Me.’”