Heshbon

intelligence, a city ruled over by Sihon, king of the Amorites (Josh 3:10; 13:17). It was taken by Moses (Num 21:23-26), and became afterwards a Levitical city (Josh 21:39) in the tribe of Reuben (Num 32:37). After the Exile it was taken possession of by the Moabites (Isa 15:4; Jer 48:2; 48:34; 48:45). The ruins of this town are still seen about 20 miles east of Jordan from the north end of the Dead Sea. There are reservoirs in this district, which are probably the "fishpools" referred to in (Cant 7:4).

EBD - Easton's Bible Dictionary