The well-known Protestant reference work, New Bible Dictionary (edited by J. D. Douglas, Grand Rapids, Michigan: Wm. B. Eerdmans Pub. Co., 1962, “Sackcloth,” p. 1112), describes biblical sackcloth: A coarse cloth . . . usually made of goat’s hair . . . Sackcloth was worn as a sign of mourning for the dead . . . , or of mourning for personal or national disaster . . . or of penitence for sins (1 Ki. 21:27; Ne. 9:1; Jon. 3:5; Mt.... Read more