Smith's Bible Dictionary (1863)
(festival or boundary), one of the cities in the extreme south of Judah, named with Dimonah and Kedesh.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
AD'ADAH (boundary, or festival), a town in the south of Judah, Josh 15:22 ; probably either the modern el-Foka or Adadah.
Hitchcock's Bible Names (1869)
testimony of the assembly