Isaiah 7:4

4. Fear not Words calculated to soothe the perturbation of David’s house and heart. Had there been faith there would also have been firmness. And the prophet’s cheer for him was confirmed by a lofty contempt for the two invaders. They are but two firebrands already burnt out even to their tails; and they are no longer blazing or burning, but only smoking, almost to extinction. Their day is about closed.

Son of Remaliah Says Hengstenberg: “The Hebrews and Arabians, when they wish to speak reproachfully of any one, omit his proper name, and call him merely son of this or that, especially when his father is but little known or respected. So Saul names David, in contempt, son of Jesse. 1Sa 20:27 ; 1 Samuel 20:31.” In this case the phrase was a reminder that Pekah was a usurper.