Cross reference
Joshua 18:15
15 The south quarter was from the uttermost part of Kiriath Jearim; and the border went out westward, and went out to the spring of the waters of Nephtoah;
Joshua 15:9
9 and the border extended from the top of the mountain to the spring of the waters of Nephtoah, and went out to the cities of Mount Ephron; and the border extended to Baalah (the same is Kiriath Jearim);