(Heb. borith mekabbeshim, i.e., "alkali of those treading
cloth"). Mention is made (Prov. 25:20; Jer. 2:22) of nitre and
also (Mal. 3:2) of soap (Heb. borith) used by the fuller in his
operations. Nitre is found in Syria, and vegetable alkali was
obtained from the ashes of certain plants. (See SOAP ¯T0003467.) Bibliography Information Easton, Matthew George. M.A., D.D., "Biblical Meaning for 'Fuller's soap' Eastons Bible Dictionary". bible-history.com - Eastons; 1897.