Numbers 21:25

²³And Sihon did not allow Israel to pass through his borders, and Sihon gathered all his people, and went out to set the battle in array against Israel into the wilderness; and he came to Jahaz, and set the battle in array against Israel.

²⁴And Israel smote him with the slaughter of the sword, and they became possessors of his land, from Arnon to Jabbok, as far as the children of Ammon, for Jazer is the borders of the children of Ammon.

— Numbers 21:25 —

²⁶For Heshbon is the city of Sihon king of the Amorites; and he before fought against the king of Moab, and they took all his land, from Aroer to Arnon.

²⁷Therefore say they who deal in dark speeches, Come to Heshbon, That the city of Sihon may be built and prepared.