Joshua 18:15

[The] southern side [begins] on the outskirts of Kiriath Jearim, and the border continues to the west to the spring of the waters of Nephtoah;

Joshua 15:9

then the border turns from the top of the mountain to the spring of the waters of Nephtoah, and continues from there to the cities of Mount Ephron; the border [then] turns [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
then the border turns from the top of the mountain to the spring of the waters of Nephtoah, and continues from there to the cities of Mount Ephron; the border [then] turns [to] Baalah (that [is], Kiriath Jearim);