Job 42:6
Why I abhor myself, and repent in dust and ashes.
Nave's Topical Index—AKJV

Daniel 9:3
And I set my face to the Lord God, to seek by prayer and supplications, with fasting, and sackcloth, and ashes:
Nave's Topical Index—AKJV

Jonah 3:6
For word came to 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.
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Matthew 11:21
Woe to you, Chorazin! woe to you, 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.
Nave's Topical Index—AKJV

Luke 10:13
Woe to you, Chorazin! woe to you, 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.
Nave's Topical Index—AKJV