'Sand' in the Bible

But everyone who hears these words of Mine and doesn’t act on them will be like a foolish man who built his house on the sand.

But Isaiah cries out concerning Israel:Though the number of Israel’s sonsis like the sand of the sea,only the remnant will be saved;

Therefore from one man—in fact, from one as good as dead—came offspring as numerous as the stars of heaven and as innumerable as the grains of sand by the seashore.

He stood on the sand of the sea.

and will go out to deceive the nations at the four corners of the earth, Gog and Magog, to gather them for battle. Their number is like the sand of the sea.