Numbers 21:25

22 "Let me pass through your land: we will not turn aside into field, or into vineyard; we will not drink of the water of the wells: we will go by the king's highway, until we have passed your border."

23 Sihon would not allow Israel to pass through his border: but Sihon gathered all his people together, and went out against Israel into the wilderness, and came to Jahaz; and he fought against Israel.

24 Israel struck him with the edge of the sword, and possessed his land from the Arnon to the Jabbok, even to the children of Ammon; for the border of the children of Ammon was strong.

25 Israel took all these cities: and Israel lived in all the cities of the Amorites, in Heshbon, and in all its towns.

26 For 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 to the Arnon.

27 Therefore those who speak in proverbs say, "Come to Heshbon. Let the city of Sihon be built and established;

28 for a fire has gone out of Heshbon, a flame from the city of Sihon. It has devoured Ar of Moab, The lords of the high places of the Arnon.