Joshua 16:3
"And goeth down westward to the coast of Japhleti, unto the coast of Bethhoron the nether, and to Gezer; and the goings out thereof are at the sea."
Cross References (ranked by relevance)
Also he built Bethhoron the upper, and Bethhoron the nether, fenced cities, with walls, gates, and bars;
Then Horam king of Gezer came up to help Lachish; and Joshua smote him and his people, until he had left him none remaining.
And the border went over from thence toward Luz, to the side of Luz, which is Bethel, southward; and the border descended to Atarothadar, near the hill that lieth on the south side of the nether Bethhoron.
And their possessions and habitations were, Bethel and the towns thereof, and eastward Naaran, and westward Gezer, with the towns thereof; Shechem also and the towns thereof, unto Gaza and the towns thereof:
(And his daughter was Sherah, who built Bethhoron the nether, and the upper, and Uzzensherah.)
And as for the western border, ye shall even have the great sea for a border: this shall be your west border.