Isaiah 11:13

The envy also -The word “envy” here, is used in the sense of “hatred,” or the hatred which arose from the “ambition” of Ephraim, and from the “prosperity” of Judah. Ephraim here, is the name for the kingdom of Israel, or the ten tribes. The reasons of their envy and enmity toward Judah, all arising from their ambition, were the following: (1) This tribe, in connection with those which were allied to it, constituted a very large and flourishing part of the Jewish nation. They were, therefore, envious of any other tribe that claimed any superiority, and particularly jealous of Judah.