Tora Yid -“and the chofezt chaim came in and said, “kook Shmook!” and then he left.” (As related by Rav Berel Sooveitchik zt’l.)”
I heard B’shem AJ – that he is going around saying the story with
“Kook, Shmook, Book”! Did you hear it directly from Rav Berel?