Judges 11:25-29

Now then, are you any better than Balak the son of Zippor, king of Moab? Did he ever contend with Israel, or did he ever fight against them?

While Israel was living in Heshbon and its villages, and in Aroer and its villages, and in all the cities that are on the banks of the Arnon, three hundred years, why did you not recover them within that time?

So I have not sinned against you, but you are doing me wrong by making war against me. May the Lord, the Judge, judge today between the sons of Israel and the sons of Ammon.’ ”

But the king of the sons of Ammon disregarded the message which Jephthah sent him. Jephthah’s Tragic Vow

Now the Spirit of the Lord came upon Jephthah, and he passed through Gilead and Manasseh; then he passed through Mizpah of Gilead, and from Mizpah of Gilead he went on to the sons of Ammon.