The border of Kenaan, as here described, extends along the coast from Zidon in the direction of (as thou goest unto) Gerar, which lay between Kadesh and Shur Genesis 20:1, and has its name preserved in the Wady el-Jerur, which is nearly in a line connecting Ain el-Weibeh and Suez. It turns at Azzah (Gaza), and passes to the cities of the plain, of which the later history is so memorable. Its terminating point is Lesha, which is generally supposed to be Callirrhoe, to the northeast of the Dead Sea, so called from the hot springs which form a stream flowing into the lake. It is possible, however, that Lesha is only another variation of Laish and Leshem, a city belonging to the Sidonians, and situated near the sources of the Jordan. Thus, we have the western, southern, and eastern border briefly given in this verse. It is manifest, however, that they did not confine themselves to these limits, but "afterward spread abroad" into the adjacent regions. The Hittite went to the northeast; the Amorite crossed the Jordan, and occupied a great part of Peraea; the Hivite, the Arkite, the Sinite, the Arvadite, the Zemarite, and the Hamathite stretched far north of the boundary.

And the border of the Canaanites was from Sidon,.... This is to be understood, not of the Canaanites, properly so called, but of them in general; and is a description of the bounds of the land of Canaan, as possessed by the people of Israel: the northern or north west border of it was Sidon, see Genesis 10:15 and is to be understood of the country which reached from that city towards the east almost as far as Jordan:
as thou comest from Gerar unto Gaza; two cities of the Philistines, well known in Scripture, the former for being the place where Abraham and Isaac sometimes sojourned, and the latter for Samson's exploits in it; these were the southern or south west border of the land of Canaan:
as thou goest unto Sodom and Gomorrah, and Admah and Zeboim; four cities destroyed by fire from heaven, as is after related in this book; these lay to the south or south east part of the land:
even unto Lashah; which, according to the Targum of Jonathan, is Callirrhoe, a place famous for hot waters, which run into the Dead sea, and who in this is followed by Jerom; but since it was not in the southern part of Judea, as Lashah was, Bochart proposes (a) Lusa, as being more likely to be the place, a city of the Arabs, which Ptolemy (b) puts in the midway between the Mediterranean and the Red sea; but this is objected to by Reland (c), since the southern borders of the land of Canaan were from the extremity of the Dead sea unto the Mediterranean sea, from which Lusa was at a great distance: the Samaritan version of this verse is very different from the Hebrew, and is this,"and the border of the Canaanites was from the river of Egypt unto the great river, the river Euphrates, and unto the hinder sea:''i.e. the western or Mediterranean.
(a) Phaleg. l. 4. c. 37. col. 309. (b) Geograph. l. 5. c. 17. (c) Palestina Illustrata, tom. 2. p. 871.