Bible Verses About Sackcloth was Worn by Persons in Affliction

Now in the twenty and fourth day of this month the children of Israel were assembled with fasting, and with sackclothes, and earth upon them.

I made sackcloth also my garment; and I became a proverb to them.

So the people of Nineveh believed God, and proclaimed a fast, and put on sackcloth, from the greatest of them even to the least of them.