'Ashes' in the Bible

“Woe (judgment is coming) to you, Chorazin! Woe to you, Bethsaida! For if the miracles done in you had been done in Tyre and Sidon [cities of the Gentiles], they would have repented long ago in sackcloth and ashes [their hearts would have been changed and they would have expressed sorrow for their sin and rebellion against God].

“Woe (judgment is coming) to you, Chorazin! Woe to you, Bethsaida! For if the miracles performed in you had been performed in Tyre and Sidon, they would have repented and changed their minds long ago, sitting in sackcloth and ashes [to show deep regret for sin].

For if the sprinkling of [ceremonially] defiled persons with the blood of goats and bulls and the ashes of a [burnt] heifer is sufficient for the cleansing of the body,

and if He condemned the cities of Sodom and Gomorrah to destruction by reducing them to ashes, having made them an example to those who would live ungodly lives thereafter;