Numbers 21:27-31

Wherefore they that speak in proverbs say, Come into Heshbon, let the city of Sihon be built and prepared:

For there is a fire gone out of Heshbon, a flame from the city of Sihon: it hath consumed Ar of Moab, and the lords of the high places of Arnon.

Woe to thee, Moab! thou art undone, O people of Chemosh: he hath given his sons that escaped, and his daughters, into captivity unto Sihon king of the Amorites.

We have shot at them; Heshbon is perished even unto Dibon, and we have laid them waste even unto Nophah, which reacheth unto Medeba.

Thus Israel dwelt in the land of the Amorites.