'Divisions' in the Bible

The officials of Issachar were with Deborah, as was the tribe of Issachar and Barak. They rushed out into the valley at his heels along with divisions from Reuben's army. Great was their resolve of heart!

Why did you sit down among the sheepfolds? To hear the bleating of the flocks? Among the divisions of the army of Reuben there was great searching of heart.