'Clans' in the Bible

the princes of Is'sachar came with Deb'orah, and Is'sachar faithful to Barak; into the valley they rushed forth at his heels. Among the clans of Reuben there were great searchings of heart.

Why did you tarry among the sheepfolds, to hear the piping for the flocks? Among the clans of Reuben there were great searchings of heart.