Sackcloth <1,,4526, sakkos>
"a warm material woven from goat's or camel's hair," and hence of a dark color, Rev 6:12; Jerome renders it saccus cilicinus (being made from the hair of the black goat of Cilicia; the Romans called it cilicium); cp. Isa 50:3; it was also used for saddle-cloths, Jos 9:4; also for making sacks, e.g., Gen 42:25, and for garments worn as expressing mourning or penitence, Mat 11:21, Luk 10:13, or for purposes of prophetic testimony, Rev 11:3.
