And when thou comest nigh over against the children of Ammon, distress them not, nor meddle with them: for I will not give thee of the land of the children of Ammon any possession; because I have given it unto the children of Lot for a possession.
Don't fight with them, for I will not give you any of their land, not even an inch of it, because I have given Esau the hill country of Seir as [his] possession.
The LORD said to me, 'Show no hostility toward Moab, and do not provoke them to battle, for I will not give you any of their land as a possession, since I have given Ar as a possession to the descendants of Lot.'"
So both of Lot's daughters became pregnant by their father.
The firstborn gave birth to a son and named him Moab. He is the father of the Moabites of today.
The younger also gave birth to a son, and she named him Ben-ammi. He is the father of the Ammonites of today.
The king of the Ammonites said to Jephthah's messengers, "When Israel came from Egypt, they seized my land from the Arnon to the Jabbok and the Jordan. Now restore it peaceably."
Jephthah again sent messengers to the king of the Ammonites
to tell him, "This is what Jephthah says: Israel did not take away the land of Moab or the land of the Ammonites.
But when they came from Egypt, Israel traveled through the wilderness to the Red Sea and came to Kadesh.
Israel sent messengers to the king of Edom, saying, 'Please let us travel through your land,' but the king of Edom would not listen. They also sent [messengers] to the king of Moab, but he refused. So Israel stayed in Kadesh.
"Then they traveled through the wilderness and around the lands of Edom and Moab. They came to the east side of the land of Moab and camped on the other side of the Arnon but did not enter into the territory of Moab, for the Arnon was the boundary of Moab.
"Then Israel sent messengers to Sihon king of the Amorites, king of Heshbon. Israel said to him, 'Please let us travel through your land to our country,'
but Sihon did not trust Israel. Instead, Sihon gathered all his people, camped at Jahaz, and fought with Israel.
Then the LORD God of Israel handed over Sihon and all his people to Israel, and they defeated them. So Israel took possession of the entire land of the Amorites who lived in that country.
They took possession of all the territory of the Amorites from the Arnon to the Jabbok and from the wilderness to the Jordan.
"The LORD God of Israel has now driven out the Amorites before His people Israel, but will you drive us out?
Isn't it true that you may possess whatever your god Chemosh drives out for you, and we may possess everything the LORD our God drives out before us?
Now are you any better than Balak son of Zippor, king of Moab? Did he ever contend with Israel or fight against them?
While Israel lived 300 years in Heshbon and its villages, in Aroer and its villages, and in all the cities that are on the banks of the Arnon, why didn't you take them back at that time?
I have not sinned against you, but you have wronged me by fighting against me. Let the LORD [who is] the Judge decide today between the Israelites and the Ammonites."
2 Chronicles 20:10
Now here are the Ammonites, Moabites, and [the inhabitants of] Mount Seir. You did not let Israel invade them when Israel came out of the land of Egypt, but Israel turned away from them and did not destroy them.