Here it is (from "Individualism and Economic Order")

"the freedom of the individual by no means need be extended to give all these freedoms to organized groups of individuals, and even that it may on occasion be the duty of government to protect the individual against organized groups."

https://goo.gl/JnftDO

You can see from the essay why a lot of right-wing American businessmen were disappointed in Hayek.

Thanks for that. Interesting, but not too surprising to anyone who has read much Hayek. Nuanced, of course.