Judah and of Israel will be gathered together: For nearly 200 years, Israel and Judah were separate kingdoms due to political rivalry. When God restores his people, he will reunite these kingdoms under one leader, like in David's time. He will also end the curse of exile (see also Ezekiel 37:15–28).
the day of Jezreel: Hosea said that in the future, God would restore Jezreel's original meaning. It will represent blessing and growth instead of judgment.