'Sand of the Sea' in the Bible

but Isaiah cries out in behalf of Israel, Though the number of sons of Israel may be as the sand of the sea, a remnant shall be saved.

And I stood upon the sand of the sea. And I saw a beast rising up out of the sea, having ten horns and seven heads; and upon his horns ten diadems, and upon his heads names of blasphemy.

and he will go forth to deceive the nations which are in the four corners of the earth, Gog and Magog, to gather them together to the war: the number of them being as the sand of the sea.