1 Chronicles 5:8-12

and Bela, the son of Azaz, the son of Shema, the son of Joel, who lived in Aroer, as far as Nebo and Baal-meon.

Toward the east he settled as far as the entrance of the wilderness from the river Euphrates, because their livestock had increased in the land of Gilead.

In the days of Saul they made war with the Hagrites, who fell by their hand, so that they occupied their tents throughout the land east of Gilead.

Now the sons of Gad lived opposite them in the land of Bashan, as far as Salecah.

Joel was the head and Shapham the second, then Janai and Shaphat in Bashan.