Their work was to cleanse garments and whiten them. The soap they employed consisted of salts mixed with oil and was of two kinds, made with carbonate of soda or with borax. See also Jer. 2:22; Mal. 3:2; Mark 9:3. The Fuller’s Field (2 Kgs. 18:17; Isa. 7:3) was close to the walls of Jerusalem, possibly on the east side.