Numbers 34:3-5

The southern boundary commenced at the Dead Sea. The broad and desolate valley by which the depressed bed of that sea is protected toward the south, is called the Ghor. A deep narrow glen enters it at its southwest corner; it is called Wady-el-Fikreh, and is continued in the same southwestern direction, under the name of Wady el-Marrah; a wady which loses itself among the hills belonging to "the wilderness of Zin;" and Kadesh-barnea (see Numbers 13:26 note), which is "in the wilderness of Zin," will be, as the text implies, the southernmost point of the southern boundary. Thence, if Kadesh be identical with the present Ain el-Weibeh, westward to the river, or brook of Egypt, now Wady el-Arish, is a distance of about seventy miles. In this interval were Hazar-addar and Azmon; the former being perhaps the general name of a district of Hazerim, or nomad hamlets (see Deuteronomy 2:23), of which Adder was one: and Azmon, perhaps to be identified with Kesam, the modern Kasaimeh, a group of springs situate in the north of one of the gaps in the ridge, and a short distance west of Ain el-Kudeirat.

(Others consider the boundary line to have followed the Ghor along the Arabah to the south of the Azazimeh mountains, thence to Gadis round the southeast of that mountain, and thence to Wady el-Arish.)