Bible Verses About Sackcloth: By God's prophets

And they answered him, He was a hairy man, and girt with a girdle of leather about his loins. And he said, It is Elijah the Tishbite.

at that time Jehovah spake by Isaiah the son of Amoz, saying, Go, and loose the sackcloth from off thy loins, and put thy shoe from off thy foot. And he did so, walking naked and barefoot.

Now John himself had his raiment of camel’s hair, and a leathern girdle about his loins; and his food was locusts and wild honey.

And I will give unto my two witnesses, and they shall prophesy a thousand two hundred and threescore days, clothed in sackcloth.