'Clans' in the Bible

And the chiefs in Issachar [were] with Deborah; and Issachar likewise [was with] Barak; into the valley {he was sent to get him from behind}. Among the clans of Reuben [were] great {decisions of the heart}.

Why do you sit among the sheepfolds, to hear [the] calling sounds of the herds? For the clans of Reuben, [there were] great searchings of the heart.