Siman 394

(3.) He said: "There are people who do not know me at all and yet oppose me." And he said it is written in the holy Zohar [Shemos 17] on the verse "Come, let us deal cleverly with them" — do you think Pharaoh went to each and every one and said "come, let us deal cleverly"? Rather he placed it within their hearts etc. — see there.