The older daughter gave birth to a son and named him Moab. He is the ancestor of the Moabites of today.
TSK
TSK · Deuteronomy 2:9
Treasury of Scripture Knowledge references in NET.
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.
Do not be hostile toward them, because I am not giving you any of their land, not even a footprint, for I have given Mount Seir as an inheritance for Esau.
just as the descendants of Esau who live at Seir and the Moabites who live in Ar did for me, until I cross the Jordan to the land the LORD our God is giving us.”
Israel sent messengers to the king of Edom, saying,“Please allow us to pass through your land.” But the king of Edom rejected the request. Israel sent the same request to the king of Moab, but he was unwilling to cooperate. So Israel stayed at Kadesh.
Even Assyria has allied with them, lending its strength to the descendants of Lot.(Selah)