'Ashes' in the Bible

[He] feeds [on] ashes; a {deceived mind} misleads him. And he cannot save {himself}, and he cannot say, "Is [this] not an illusion in my right hand?"

Is [the] fast I choose like this, a day for humankind to humiliate {himself}? To bow his head like a reed, and {make} his bed [on] sackcloth and ashes; you call this a fast and a day of pleasure to Yahweh?

to {give} for those in mourning in Zion, to give them a head wrap instead of ashes, [the] oil of joy instead of mourning, a garment of praise instead of a faint spirit. And {they will be called} oaks of righteousness, the planting of Yahweh, to show his glory.