'Dust' in the Bible

Now, O Lord God, Your promise to my father David is fulfilled, for You have made me king over a people as numerous as the dust of the earth.

They tore down the altars of the Baals in his presence; he cut to pieces the incense altars that were high above them; he also smashed the Asherim and the carved images and the cast images to pieces, and ground them to dust and scattered it on the graves of those who had sacrificed to them.