Numbers 21:26-29

26For Heshbon was the city of Sihon the king of the Amorites, who had fought against the former king of Moab, and taken all his land out of his hand, even unto Arnon.

27Wherefore they that speak in proverbs say, Come ye to Heshbon, Let the city of Sihon be built and established:

28For a fire is gone out of Heshbon, A flame from the city of Sihon: It hath devoured Ar of Moab, The lords of the high places of Arnon.

29Woe to thee, Moab! Thou art undone, O people of Chemosh: He hath given his sons as fugitives, And his daughters into captivity, Unto Sihon king of the Amorites.