'Ashes' in the Bible

And he took him a potsherd to scrape himself withal; and he sat down among the ashes.

Observing him from a distance, at first they didn't even recognize him, so they raised their voices and burst into tears. They each ripped their robes, threw ashes into the air on their heads,

Your remembrances are like unto ashes, your bodies to bodies of clay.

He hath cast me into the mire, and I am become like dust and ashes.

Wherefore I abhor myself, and repent in dust and ashes.