|Easton's Bible Dictionary|
Trodden down (called also Jahaza, Joshua 13:18; Jahazah, 21:36; Jahzah, 1 Chronicles 6:78), a town where Sihon was defeated, in the borders of Moab and in the land of the Ammonites beyond Jordan, and north of the river Arnon (Numbers 21:23; Deuteronomy 2:32). It was situated in the tribe of Reuben, and was assigned to the Merarite Levites (Joshua 13:18; 21:36). Here was fought the decisive battle in which Sihon (q.v.) was completely routed, and his territory (the modern Belka) came into the possession of Israel. This town is mentioned in the denunciations of the prophets against Moab (Isaiah 15:4; Jeremiah 48:34).
Int. Standard Bible Encyclopedia
ja'-haz (yahats, Isaiah 16:4 Jeremiah 48:34, yahatsah, or yahtsah, Numbers 21:23 Deuteronomy 2:32 Joshua 13:18; Joshua 21:36, the King James Version "Jahazah"; Judges 11:20 Jeremiah 48:21 1 Chronicles 6:78, "Jahzah"): This is the place where in a great battle Israel overwhelmed Sihon king of the Amorites, and then took possession of all his territory (Numbers 21:23, etc.). It is named along with Beth-baal-meon and Kedemoth (Joshua 13:18), with Kedemoth (Joshua 21:37) pointing to a position in the Southeast of the Amorite territory. It was given to Reuben by Moses, and was one of the cities in the portion of that tribe assigned to the Merarite Levites. Mesha (MS, ll. 18 if) says that the king of Israel dwelt in Jahaz when at war with him. Mesha drove him out, and the city passed into the hands of Moab. It is referred to as a city of Moab in Isaiah 15:4 Jeremiah 48:21, 34. Cheyne thinks that either Jahaz or Kedemoth must be represented today by the important ruins of Umm er-Recac, about 2 1/2 hours North of Dibon toward the desert (EB, under the word). No certain identification is possible.
Jahaz (8 Occurrences)
Numbers 21:23 Sihon would not allow Israel to pass through his border: but Sihon gathered all his people together, and went out against Israel into the wilderness, and came to Jahaz; and he fought against Israel. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)
Deuteronomy 2:32 Then Sihon came out against us, he and all his people, to battle at Jahaz. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)
Joshua 13:18 Jahaz, Kedemoth, Mephaath, (WEB KJV JPS ASV BBE WBS YLT NAS RSV NIV)
Joshua 21:36 Out of the tribe of Reuben, Bezer with its suburbs, Jahaz with its suburbs, (WEB KJV JPS ASV BBE WBS YLT NAS RSV NIV)
Judges 11:20 But Sihon didn't trust Israel to pass through his border; but Sihon gathered all his people together, and encamped in Jahaz, and fought against Israel. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)
1 Chronicles 6:78 and beyond the Jordan at Jericho, on the east side of the Jordan, were given them, out of the tribe of Reuben, Bezer in the wilderness with its suburbs, and Jahzah with its suburbs, (See JPS)
Isaiah 15:4 Heshbon cries out with Elealeh. Their voice is heard even to Jahaz. Therefore the armed men of Moab cry aloud. Their souls tremble within them. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)
Jeremiah 48:34 From the cry of Heshbon even to Elealeh, even to Jahaz have they uttered their voice, from Zoar even to Horonaim, to Eglath Shelishiyah: for the waters of Nimrim also shall become desolate. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)