Easton's Bible Dictionary (1897)
Trodden down (called also Jahaza, Josh. 13:18; Jahazah, 21:36; Jahzah, 1 Chr. 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 (Num. 21:23; Deut. 2:32). It was situated in the tribe of Reuben, and was assigned to the Merarite Levites (Josh. 13:18; 21:36). ) 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 (Isa. 15:4; Jer. 48:34).
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
JA'HAZ (place trodden down), a Moabitish city situated near the desert; afterward reckoned to the tribe of Reuben and assigned to the priests. Num 21:23; Deut 2:32; Isa 15:4; Jer 48:34. It is also called Jahaza, Josh 13:18, Jahazah, Josh 21:36; Jer 48:21, and Jahzah. 1 Chr 6:78. At this place the Israelites gained a victory over Sihon and conquered the territory between the Arnon and the Jabbok; but in later times Jahaz seems to have been occupied by the Moabites. Osborn locates Jahaz a mile south of the Arnon and 12 miles east of the Dead Sea.
Hitchcock's Bible Names (1869)
Jahazah, quarrel; dispute