'Dust' in the Bible

And I took your sin, the calf which ye had made, and burnt it with fire, and stamped it, and ground it very small, even until it was as small as dust: and I cast the dust thereof into the brook that descended out of the mount.

The LORD shall make the rain of thy land powder and dust: from heaven shall it come down upon thee, until thou be destroyed.

They shall be burnt with hunger, and devoured with burning heat, and with bitter destruction: I will also send the teeth of beasts upon them, with the poison of serpents of the dust.