Joshua 21:36-37

21:36 from the tribe of Reuben: Bezer, Jahaz, 21:37 Kedemoth, and Mephaath, along with the grazing areas of each – a total of four cities;

Numbers 21:23

21:23 But Sihon did not permit Israel to pass through his border; he gathered all his forces together and went out against Israel into the wilderness. When he came to Jahaz, he fought against Israel.