This then was the lot of the tribe of the children of Judah by their families; even to the border of Edom the wilderness of Zin southward was the uttermost part of the south coast.

Wesley's Notes

15:1 The lot - For the general understanding of this, it must be known That casting lots was transacted with great seriousness and solemnity, in God's presence, with prayer and appeal to him for the decision of the matter. That although exact survey of this land was not taken 'till chap.18:4,5, yet there was, and must needs be a general description of it, and a division thereof into nine parts and an half; which, as far as they could guess, were equal either in quantity or quality. That the lot did not at this time so unchangeably determine each tribe, that their portion could neither be increased or diminished; as is manifest, because after Judah's lot was fixed, Simeon's lot was taken out of it, chap.19:9, though after the land was more distinctly known and surveyed, it is likely the bounds were more certain and fixed. That the lot determined only in general what part of the land belonged to each tribe, but left the particulars to be determined by Joshua and Eleazar. For the manner of this, it is probably conceived, that there was two pots, into one of which were put the names of all the tribes, each in a distinct paper, and into the other the names of each portion described; then Eleazar or some other person, drew out first the name of one of the tribes out of one pot, and then the name of one portion out of the other, and that portion was appropriated to that tribe. And with respect to these pots, in the bottom of which the papers lay, these lots are often said to come up, or come forth. Of Judah - Whose lot came out first by God's disposition, as a note of his preeminency above his brethren. Of Edom - Which lay south - east from Judah's portion. Judah and Joseph were the two sons of Jacob, on whom Reuben's forfeited birthright devolved. Judah had the dominion entailed upon him, and Joseph the double portion. Therefore these two tribes are first seated: and on them the other seven attended.

Jamieson-Fausset-Brown Bible Commentary

CHAPTER 15

Jos 15:1-12. Borders of the Lot of Judah.

1. This then was the lot of the tribe of the children of Judah-In what manner the lot was drawn on this occasion the sacred historian does not say; but it is probable that the method adopted was similar to that described in Jos 18:10. Though the general survey of the country had not been completed, some rough draft or delineation of the first conquered part must have been made, and satisfactory evidence obtained that it was large enough to furnish three cantons, before all the tribes cast lots for them; and they fell to Judah, Ephraim, and the half-tribe of Manasseh. The lot of Judah came first, in token of the pre-eminence of that tribe over all the others; and its destined superiority thus received the visible sanction of God. The territory, assigned to it as a possession, was large and extensive, being bounded on the south by the wilderness of Zin, and the southern extremity of the Salt Sea (Nu 34:3-5); on the east, by that sea, extending to the point where it receives the waters of the Jordan; on the north, by a line drawn nearly parallel to Jerusalem, across the country, from the northern extremity of the Salt Sea to the southern limits of the Philistine territory, and to the Mediterranean; and on the west this sea was its boundary, as far as Sihor (Wady El-Arish).

Matthew Henry's Concise Commentary

15:1-12 Joshua allotted to Judah, Ephraim, and the half of Manasseh, their inheritances before they left Gilgal. Afterwards removing to Shiloh, another survey was made, and the other tribes had their portion assigned. In due time all God's people are settled.