Numbers 21:14-16, 27-30

That is why it is said in the Book of the Wars of the LORD: “Waheb in Suphah, And the wadis of the Arnon [River], And the slope of the wadis That stretches toward the site of Ar And leans to the border of Moab.” From there the Israelites went on to Beer, that is the well where the LORD said to Moses, “Gather the people together and I will give them water.” [John 7:37-39]

That is why those who use proverbs say, “Come to Heshbon, Let the city of Sihon be built and established. “For fire has gone out of Heshbon, A flame from the city of Sihon; It devoured Ar of Moab And the lords of the heights of the Arnon. “Woe (judgment is coming) to you, Moab! You are destroyed, O people of [the god] Chemosh! Moab has given his sons as fugitives [that is, survivors of battle], And his daughters into captivity To Sihon king of the Amorites. “We have shot them down [with arrows]; Heshbon is destroyed as far as Dibon, And we have laid them waste as far as Nophah, Which reaches to Medeba.”