Numbers 21:23 But Sihon would not permit Israel to pass through his border. So Sihon gathered all his people and went out against Israel in the wilderness, and came to Jahaz and fought against Israel.

Joshua 13:18 and Jahaz and Kedemoth and Mephaath,

Isaiah 15:4 Heshbon and Elealeh also cry out, Their voice is heard all the way to Jahaz; Therefore the armed men of Moab cry aloud; His soul trembles within him.

Jeremiah 48:34 "From the outcry at Heshbon even to Elealeh, even to Jahaz they have raised their voice, from Zoar even to Horonaim and to Eglath-shelishiyah; for even the waters of Nimrim will become desolate. (NASB ©1995)