'Tribe' in the Bible

Saul answered, "Am I not a Benjamite, of the smallest of the tribes of Israel? And my family the least of all the families of the tribe of Benjamin? Why then do you speak to me like this?"

So Samuel brought all the tribes of Israel near, and the tribe of Benjamin was taken.

He brought the tribe of Benjamin near by their families; and the family of the Matrites was taken; and Saul the son of Kish was taken: but when they sought him, he could not be found.