Boyd’s Bible Dictionary:
(blackness). (1) Southern boundary of David’s empire (1 Chron. 13:5). [SIHOR.] (2) Shihorlibnath, a boundary of Asher, and probably identical with the stream called “Blue River,” which empties into the Mediterranean eight miles south of Dor (Josh. 19:26).
Concise Bible Dictionary:
See SIHOR.