9, 10. Israel is referred to in Ho 5:9, Judah in Ho 5:10.
the day of rebuke—the day when I shall chastise him.
among the tribes of Israel have I made known—proving that the scene of Hosea's labor was among the ten tribes.
that which shall surely be—namely, the coming judgment here foretold. It is no longer a conditional decree, leaving a hope of pardon on repentance; it is absolute, for Ephraim is hopelessly impenitent.