'Ashes' in the Bible

And he gave a sign the same day, saying, “This is the sign which the Lord has spoken: ‘Behold, the altar shall be split apart and the ashes that are on it shall be poured out.’”

The altar also was split apart and the ashes were poured out from the altar in accordance with the sign which the man of God had given by the word of the Lord.

So the prophet left and waited for King Ahab by the road, and disguised himself [as a wounded soldier] with a bandage over his eyes.

Then the prophet quickly removed the bandage from his eyes, and [Ahab] the king of Israel recognized him as one of the prophets.