The Elder Husyatiner was a kapdan (stickler). On a particular occasion, the gabai (sexton) R. David handed him a cup, which overturned. This caused the Husyatiner to glare at him with a frightening look, which filled him with fear. Immediately, R. David developed a skin rash and was not allowed to enter the Rebbe’s presence for some time, until he was able to ask for forgiveness.
Y.F.
Yaakov Teitelbaum