1 Chronicles 5:25-26

25But these tribes were unfaithful to the God of their ancestors. They worshiped the gods of the nations that God had destroyed.

26So the God of Israel caused King Pul of Assyria (also known as Tiglath-pileser) to invade the land and take away the people of Reuben, Gad, and the half-tribe of Manasseh as captives. The Assyrians exiled them to Halah, Habor, Hara, and the Gozan River, where they remain to this day.