'Allied' in the Bible

When the house of David (Judah) was told, “Aram is allied with Ephraim (Israel),” the hearts of Ahaz and his people trembled as the trees of the forest tremble in 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.