The boundary goes out to the shoulder of the hill north of Ekron, then the boundary bends around to Shikkeron and passes along to Mount Baalah and goes out to Jabneel. Then the boundary comes to an end at the sea.
Judah and Joseph were the two sons of Jacob on whom Reuben's forfeited birth-right devolved. Judah had the dominion entailed on him, and Joseph the double portion, and therefore these two tribes were first seated, Judah in the southern part of the land of Canaan and Joseph in the northern part, and on them the other seven did attend, and had their respective lots as...
Commenting on Joshua 15:1-12
And the border went out unto the side of Ekron northward,.... Which was one of the principalities of the Philistines; and which, though it fell to the lot of Judah, Jos 15:45, was not possessed by them: and the border was drawn to Shicron, and passed along to Mount Baalah; of which places we have no account elsewhere: and went unto Jabneel; which Masius makes...
And the border went out unto the side of Ekron northward: and the border was drawn to Shicron, and passed along to mount Baalah, and went out unto Jabneel; and the goings out of the border were at the sea. (d) Meaning, toward Syria.