R’ Dovid Moshe Yisraeli, a Sanzer chossid from Ashdod who passed away last year after a severe illness, recently appeared in a dream to his good friend, Tzvi Cahana. Noticing that Yisraeli looked miserable, Cahana asked him why his painful death had not atoned for his wrongdoings.
Yisraeli replied that there was one sin his suffering had not atoned for: speaking during tefillah. He asked his friend to publicize this in his name as a benefit for his soul.
Notices were placed in shuls to notify the tzibbur of his warning.