The Amorites: Acquired an Extensive Territory from Moab East of Jordan
Source: TTT
Numbers 21:26, 30
Heshbon was the city of Sihon king of the Amorites, who had fought against the former king of Moab and taken all his land as far as the Arnon. / But we have overthrown them; Heshbon is destroyed as far as Dibon. We demolished them as far as Nophah, which reaches to Medeba.”