Jabbok

“And Israel put him to the sword and took possession of his land, from the Arnon to the Jabbok—but only up to the border of the Ammonites, because it was fortified.”

“The king of the Ammonites answered Jephthah’s messengers, “When Israel came up out of Egypt, they seized my land, from the Arnon to the Jabbok and all the way to the Jordan. Now, therefore, restore it peaceably.””

“Sihon king of the Amorites, who lived in Heshbon. He ruled from Aroer on the rim of the Arnon Valley, along the middle of the valley, up to the Jabbok River (the border of the Ammonites), that is, half of Gilead,”

“and to the Reubenites and Gadites I gave the territory from Gilead to the Arnon Valley (the middle of the valley was the border) and up to the Jabbok River, the border of the Ammonites.”

“seizing all the land from the Arnon to the Jabbok and from the wilderness to the Jordan.”