'Tribes' in the Bible

And over the tribes of Israel: Of the Reubenite, a leader is Eliezer son of Zichri; of the Simeonite, Shephatiah son of Maachah;

these are heads of the tribes of Israel.

And David assembleth all the heads of Israel, heads of the tribes, and heads of the courses who are serving the king, and heads of the thousands, and heads of the hundreds, and heads of all the substance and possessions of the king, and of his sons, with the officers and the mighty ones, even to every mighty one of valour -- unto Jerusalem.

And the heads of the fathers, and the heads of the tribes of Israel, and the heads of the thousands, and of the hundreds, even to the heads of the work of the king, offer willingly.