Ashes in the Bible

Numbers 19:9-10 And a man that is clean shall gather up the ashes of the heifer, and lay them up without the camp in a clean place, and it shall be kept for the congregation of the children of Israel for a water of separation: it is a purification for sin. 10 And he that gathereth the ashes of the heifer shall wash his clothes, and be unclean until the even: and it shall be unto the children of Israel, and unto the stranger that sojourneth among them, for a statute for ever.
Numbers 19:17 And for an unclean person they shall take of the ashes of the burnt heifer of purification for sin, and running water shall be put thereto in a vessel:
Hebrews 9:13 For if the blood of bulls and of goats, and the ashes of an heifer sprinkling the unclean, sanctifieth to the purifying of the flesh:

2 Samuel 13:19 And Tamar put ashes on her head, and rent her garment of divers colours that was on her, and laid her hand on her head, and went on crying.
Esther 4:1 When Mordecai perceived all that was done, Mordecai rent his clothes, and put on sackcloth with ashes, and went out into the midst of the city, and cried with a loud and a bitter cry;
Esther 4:3 And in every province, whithersoever the king's commandment and his decree came, there was great mourning among the Jews, and fasting, and weeping, and wailing; and many lay in sackcloth and ashes.

Job 2:8 And he took him a potsherd to scrape himself withal; and he sat down among the ashes.

Job 42:6 Wherefore I abhor myself, and repent in dust and ashes.
Daniel 9:3 And I set my face unto the Lord God, to seek by prayer and supplications, with fasting, and sackcloth, and ashes:
Jonah 3:6 For word came unto the king of Nineveh, and he arose from his throne, and he laid his robe from him, and covered him with sackcloth, and sat in ashes.
Matthew 11:21 Woe unto thee, Chorazin! woe unto thee, Bethsaida! for if the mighty works, which were done in you, had been done in Tyre and Sidon, they would have repented long ago in sackcloth and ashes.
Luke 10:13 Woe unto thee, Chorazin! woe unto thee, Bethsaida! for if the mighty works had been done in Tyre and Sidon, which have been done in you, they had a great while ago repented, sitting in sackcloth and ashes.

1 Kings 20:38 So the prophet departed, and waited for the king by the way, and disguised himself with ashes upon his face.
1 Kings 20:41 And he hasted, and took the ashes away from his face; and the king of Israel discerned him that he was of the prophets.