Judges 11:12-15, 32-33

Then Jephthah sent messengers to the king of Ammon, asking, “Why have you come out to fight against my land?” The king of Ammon answered Jephthah’s messengers, “When the Israelites came out of Egypt, they stole my land from the Arnon River to the Jabbok River and all the way to the Jordan. Now then, give back the land peaceably.” Jephthah sent this message back to the Ammonite king: “This is what Jephthah says: Israel did not steal any land from Moab or Ammon.

So Jephthah led his army against the Ammonites, and the LORD gave him victory. He crushed the Ammonites, devastating about twenty towns from Aroer to an area near Minnith and as far away as Abel-keramim. In this way Israel defeated the Ammonites.