'Ashes' in the Bible

and shall cause their voice to be heard over you, and shall cry bitterly, and shall cast up dust on their heads, they shall wallow themselves in the ashes:

By the multitude of your iniquities, in the unrighteousness of your traffic, you have profaned your sanctuaries; therefore have I brought forth a fire from the midst of you; it has devoured you, and I have turned you to ashes on the earth in the sight of all those who see you.