Isaiah 9:11-12

Because of this pride, Yahweh would raise up strong adversaries from the northeast and the southwest: the Syrians (Arameans) and the Philistines (cf. Numbers 20:12; 2 Samuel 11:27). He would teach them that they could not overcome these enemies on their own, and that they needed His salvation. Yet in spite of these judgments, the Lord’s anger would still be against Ephraim, and His hand of judgment would be stretched out against her because she would not repent.

"This text is about sinners in the hands of an angry God. In fact, God, the most loving person in the Bible, is also the angriest person in the Bible." [Note: Ortlund, p. 101.]