'Ashes' in the Bible

So I said, "Oh, my dear people, put on sackcloth and roll in ashes. Mourn with painful sobs as though you had lost your only child. For any moment now that destructive army will come against us."

The whole valley where dead bodies and sacrificial ashes are thrown and all the terraced fields out to the Kidron Valley on the east as far north as the Horse Gate will be included within this city that is sacred to the Lord. The city will never again be torn down or destroyed."