Judges 11:13

11:13 The Ammonite king said to Jephthah’s messengers, “Because Israel stole my land when they came up from Egypt – from the Arnon River in the south to the Jabbok River in the north, and as far west as the Jordan. Now return it peaceably!”

Judges 11:26

11:26 Israel has been living in Heshbon and its nearby towns, in Aroer and its nearby towns, and in all the cities along the Arnon for three hundred years! Why did you not reclaim them during that time?