Some have thought that it is the Lord Jesus Christ that is spoken of as fruitful among his brethren. And no doubt Christ is abundantly fruitful; as Jacob prophesied of him, as a fruitful bough whose branches run over the wall. Genesis 49:22. But this cannot be spoken of Christ, because it follows that his spring shall become dry, and his fountain shall be dried up. And as Samaria, which was the chief city of Ephraim, is also said to be desolate, it should seem to be rather a reference to Ephraim, who was fruitful among Israel's children; see Genesis 48:17-19.
Related Commentaries of Hosea 13:15
Hosea 13:15-16
15 Though he be fruitful among his brethren, an east wind shall come, the wind of the LORD shall come up from the wilderness, and his spring shall become dry, and his fountain shall be dried up: he shall spoil the treasure of all pleasantf vessels.
16 Samaria shall become desolate; for she hath rebelled against her God: they shall fall by the sword: their infants shall be dashed in pieces, and their women with child shall be ripped up.