Numbers 21:13-14
21:13 From there they moved on and camped on the other side of the Arnon, in the wilderness that extends from the regions
of the Amorites, for Arnon is the border of Moab, between Moab and the Amorites.
21:14 This is why it is said in the Book of the Wars of the
Lord,
“Waheb in Suphah and the wadis,
the Arnon
Numbers 21:26-28
21:26 For Heshbon was the city of King Sihon of the Amorites. Now he had fought against the former king of Moab and had taken all of his land from his control,
as far as the Arnon.
21:27 That is why those who speak in proverbs
say,
“Come to Heshbon, let it be built.
Let the city of Sihon be established!
21:28 For fire went out from Heshbon,
a flame from the city of Sihon.
It has consumed Ar of Moab
and the lords of the high places of Arnon.