Sackcloth

• A symbol of mourning — 1 Kings 20:31; 1 Kings 20:32; Job 16:15; Isaiah 15:3; Jeremiah 4:8; Jeremiah 6:26; Jeremiah 49:3; Lamentations 2:10; Ezekiel 7:18; Daniel 9:3; Joel 1:8
• Worn by Jacob when it was reported to him that Joseph had been devoured by wild animals — Genesis 37:34
• Animals covered with, at a time of national mourning — Jonah 3:8

Topical outline from Nave's Topical Bible (1897). The sub-headings are Nave's own.