Yet he also is wise, and will bring evil, and will not call back his words: but will arise against the house of the evildoers, and against the help of them that work iniquity.
Yet he also is wise - as well as the Egyptian priests, so famed for wisdom (Acts 7:22), but who are "fools" before Him (Isaiah 19:11).
And will not call back his words. He not only devises, but executes what He devises, without 'calling back His words' (Numbers 23:19).
House of the evil-doers - the whole race.
The help - the Egyptian succour sought by the Jews.