1 Chronicles 26:31-32

31Also from the clan of Hebron came Jeriah, who was the leader of the Hebronites according to the genealogical records. (In the fortieth year of David’s reign, a search was made in the records, and capable men from the clan of Hebron were found at Jazer in the land of Gilead.)

32There were 2,700 capable men among the relatives of Jeriah. King David sent them to the east side of the Jordan River and put them in charge of the tribes of Reuben and Gad and the half-tribe of Manasseh. They were responsible for all matters related to God and to the king.