Joshua 18:15

Then the south side was from the edge of Kiriath-jearim, and the border went westward and went to the fountain of the waters of Nephtoah.

Joshua 15:9

From the top of the mountain the border curved to the spring of the waters of Nephtoah and proceeded to the cities of Mount Ephron, then the border curved to Baalah (that is, Kiriath-jearim).

Treasury of Scripture Knowledge

Summary

And the south quarter was from the end of Kirjathjearim, and the border went out on the west, and went out to the well of waters of Nephtoah:

Nephtoah

Bible References

Nephtoah

Joshua 15:9
From the top of the mountain the border curved to the spring of the waters of Nephtoah and proceeded to the cities of Mount Ephron, then the border curved to Baalah (that is, Kiriath-jearim).