Nibshan
Easton's Dictionary
Fertile; light soil, a city somewhere “in the wilderness” of Judah (Josh. 15:62), probably near Engedi.
Smith's Dictionary
(soft soil) one of the six cities of Judah, (Joshua 15:62) which were in the district of the Midbar (Authorized Version “wilderness”).
International Standard Bible Encyclopedia
nib'-shan (ha-nibhshan; Codex Vaticanus Naphlazon; Codex Alexandrinus Nebsan): A city in the Judean wilderness named between Secacah and the City of Salt (Jos 15:62). Eusebius, Onomasticon, knows the place but gives no clue to its identification. The site has not been recovered. Wellhausen suggests the emendation of nibhshan to kibhshan, "furnace" (Proleg. 2, 344).