In that day the Lord will shave with a razor that is hired beyond the River—with the king of Assyria—the head and the hair of the feet, and it will sweep away the beard also.
20. The Lord will shave with a hired razor. He now employs a different metaphor, and compares those enemies by whom the Lord had determined to afflict Judea at the appointed time, to a razor, by which the beard and hair are shaved, and other excrescences of the same kind are removed.
After the comfortable promises made to Ahaz as a branch of the house of David, here follow terrible threatenings against him, as a degenerate branch of that house; for though the loving-kindness of God shall not be utterly taken away, for the sake of David and the covenant made with him, yet his iniquity shall be chastened with the rod, and his sin with stripes.
Commenting on Isaiah 7:17-25
In the same day shall the Lord shave with a razor that is hired,.... Meaning the Assyrian monarch, whom he would use as an instrument in his hand to spoil and cut off the people of the Jews; who is compared to a "razor" for sharpness; and for the thorough work, and utter ruin and destruction, he should be the means of; and called a...