'Sand' in the Bible

Everyone who hears these words of mine and does not do them is like a foolish man who built his house on sand.

And Isaiah cries out on behalf of Israel, "Though the number of the children of Israel are as the sand of the sea, only the remnant will be saved,

So in fact children were fathered by one man -- and this one as good as dead -- like the number of stars in the sky and like the innumerable grains of sand on the seashore.

So the dragon became enraged at the woman and went away to make war on the rest of her children, those who keep God's commandments and hold to the testimony about Jesus. And the dragon stood on the sand of the seashore.

and will go out to deceive the nations at the four corners of the earth, Gog and Magog, to bring them together for the battle. They are as numerous as the grains of sand in the sea.