Joshua 15:14

and the border went out to the side of Ekron northward; and the border extended to Shikkeron, and passed along to Mount Baalah, and went out at Jabneel; and the goings out of the border were at the sea.

The west border was to the shore of the great sea. This is the border of the children of Judah according to their families.

He gave to Caleb the son of Jephunneh a portion among the children of Judah, according to the commandment of the LORD to Joshua, even Kiriath Arba, named after the father of Anak (also called Hebron).

He went up against the inhabitants of Debir: now the name of Debir before was Kiriath Sepher.

Caleb said, “He who strikes Kiriath Sepher, and takes it, to him I will give Achsah my daughter as wife.”

Othniel the son of Kenaz, the brother of Caleb, took it: and he gave him Achsah his daughter as wife.