Sackcloth (
Hebrew שַׂק
saḳ) is a term originally denoting a coarsely woven fabric, usually made of goat's hair. It later came to mean also a garment made from such cloth, which was chiefly worn as a token of
mourning by the
Israelites. It was furthermore a sign of submission (I Kings xx. 30 et seq.), and was occasionally worn by
the Prophets.