Wherefore it shall come to pass... — Better, And it shall come to pass ... The boast of the proud king is interrupted by the reassertion of the fact that he is but an instrument in the hand of Jehovah, and that when his work was done he too will be punished for his pride. The “fruit” of the “stout heart” includes all the words and acts in which his arrogance had shown itself.
Related Commentaries of Isaiah 10:12
Isaiah 10:12
12 Wherefore it shall come to pass, that when the Lord hath performed his whole work upon mount Zion and on Jerusalem, I will punishc the fruit of the stout heart of the king of Assyria, and the glory of his high looks.