Read Isaiah 11:13 Using Other Translations
The envy also of Ephraim shall depart, and the adversaries of Judah shall be cut off: Ephraim shall not envy Judah, and Judah shall not vex Ephraim.
The jealousy of Ephraim shall depart, and those who harass Judah shall be cut off; Ephraim shall not be jealous of Judah, and Judah shall not harass Ephraim.
Then at last the jealousy between Israel and Judah will end. They will not be rivals anymore.