Joshua 18:15

And the south side from the extremity of the City of Forests, and the bound went out to the sea, and went out to the fountain of water of Neptitoah:

Joshua 15:9

And the bound extended from the head of the mountain to the fountain of water of Nephtoah, and it went out to the city of mount Ephron; and the bound extended to Baalah; this is Kirjath-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
And the bound extended from the head of the mountain to the fountain of water of Nephtoah, and it went out to the city of mount Ephron; and the bound extended to Baalah; this is Kirjath-Jearim: