Siman 87

(7.) 5564 [1803/4], on Sabbath night after Kiddush: I saw in a dream — and I was within a city, and it seemed to me in the dream that the city was very large. And a great tzaddik came there from the earlier tzaddikim, who was established as a great tzaddik, and everyone went to him. And I also went to him, and I saw that they were all passing before him on his side without greeting him, and it appeared that they were doing this deliberately. And I was very astonished at their audacity — for I knew that he was a great tzaddik. And I asked about this — how they had such audacity as to deliberately not greet him. And the answer was: In truth he is a great tzaddik, but he has a body assembled from various places that are the aspect of dirty places. But he himself is a great man, and he had accepted upon himself to rectify this body. And one does not greet a fellow in a dirty place [Shabbos 10b] — therefore they did not greet him.