David — Ahaz, and his relations. He calls them the house of David, to intimate that the following comfortable message was sent to Ahaz, not for his own sake, but for the sake of his worthy progenitor David. Ephraim — The kingdom of the ten tribes, commonly called Ephraim, because that was the most numerous of all. Moved — With fear, arising from a consciousness of their own guilt, and their enemies strength.
Related Commentaries of Isaiah 7:2
Isaiah 7:2
2 And it was told the house of David, saying, Syria is confederatea with Ephraim. And his heart was moved, and the heart of his people, as the trees of the wood are moved with the wind.