Hosea 9:3

"They will not remain in the land of Jehovah: Ephraim returns to Egypt, and they will eat unclean things in the land of Asshur. Hos 9:4. They will not pour out wine to Jehovah, and their slain-offerings will not please Him: like bread of mourning are they to Him; all who eat it become unclean: for their bread is for themselves, it does not come into the house of Jehovah." Because they have fallen away from Jehovah, He will drive them out of His land. The driving away is described as a return to Egypt, as in Hos 8:13; but Asshur is mentioned immediately afterwards as the actual land of banishment. That this threat is not to be understood as implying that they will be carried away to Egypt as well as to Assyria, but that Egypt is referred to here and in Hos 9:6, just as in Hos 8:13, simply as a type of the land of captivity, so that Assyria is represented as a new Egypt, may be clearly seen from the words themselves, in which eating unclean bread in Assyria is mentioned as the direct consequence of their return to Egypt; whereas neither here nor in Hos 9:6 is their being carried away to Assyria mentioned at all; but, on the contrary, in Hos 9:6, Egypt only is introduced as the place where they are to find their grave. This is still more evident from the fact that Hosea throughout speaks of Asshur alone, as the rod of the wrath of God for His rebellious people. The king of Asshur is king Jareb (striver), to whom Ephraim goes for help, and by whom it will be put to shame (Hos 5:13; Hos 10:6); and it is from the Assyrian king Salman that devastation and destruction proceed (Hos 10:14). And, lastly, it is expressly stated in Hos 11:5, that Israel will not return to Egypt, but to Asshur, who will be its king. By the allusion to Egypt, therefore, the carrying away to Assyria is…

In this chapter, I. God threatens to deprive this degenerate seed of Israel of all their worldly enjoyments, because by sin they had forfeited their title to them; so that they should have no comfort either in receiving them themselves or in offering them to God (Hos 9:1-5). II. He dooms them to utter ruin, for their own sins and the sins of their prophets (Hos 9:6-8). III. He upbraids them with the wickedness of their fathers before them, whose steps they trod in (Hos 9:9, Hos 9:10). IV. He threatens them with the destruction of their children and the rooting out of their posterity (Hos 9:11-17).

9:3 God would exile the Israelites to Assyria in 722 BC. There, in an unclean land, they would eat ceremonially unclean food, further separating themselves from their covenant with the Lord.