Zin in the Old Testament
(1) Zin was a town in the extreme South of Judah, on the line separating that province from Edom, named between the ascent of Akrabbim and Kadesh-barnea (Nu 34:4; Josh 15:3). It must have lain somewhere between Wady el-Fiqra (the ascent of Akrabbim?) and `Ain Qadis (Kadesh-barnea); but the site has not been recovered.
(2) The Wilderness of Zin is the tract deriving its name from the town (Nu 34:3). It is identified with the wilderness of Kadesh in Nu 33:36; while in other places Kadesh is said to be in the wilderness of Zin (Nu 20:1; 27:14; Dt 32:51).
We may take it that the two names refer to the same region. The spies, who set out from Kadesh-barnea, explored the land from the wilderness of Zin northward (Nu 13:21; compare 32:8). It bordered with Judah "at the uttermost part of the south" (Josh 15:1).
In this wilderness Moses committed the offense which cost him his hope of entering the promised land (Nu 27:14; Dt 32:51). It is identical with the uplands lying to the North and Northwest of the wilderness of Paran, now occupied by the `Azazimeh Arabs.
International Standard Bible Encyclopedia, which is in the public domain.