'Allied' in the Bible

And it was told the house of David saying, Syria is allied with Ephraim. Then his heart and the heart of his people shook, as the trees of the forest are shaken with the wind.

The land of Judah [Assyria’s ally] will become a terror to the Egyptians; everyone to whom Judah is mentioned will be in dread of it, because of the purpose of the Lord of hosts which He is planning against Egypt.