Charles Ellicott Commentary 2 Kings 25:5

"But the army of the Chaldeans pursued after the king, and overtook him in the plains of Jericho; and all his army was scattered from him." — 2 Kings 25:5 (ASV)

In the plains of Jericho. —In the neighborhood of Jericho, the Arabah expands to the breadth of eleven or twelve miles. The part west of Jordan was called the “plains” (Arbôth plural of Arabah) of Jericho; and that which lay east of the river was known as the plains of Moab (Joshua 4:13; Numbers 22:1). The depression between the Dead Sea and the Gulf of Akaba still bears the old name of the Arabah; between the Dead Sea and the Lake of Tiberias it is called the Ghor.