SEFER CHOFETZ CHAIM
Day 2 – Breach of Halachah
It is forbidden to relate that someone has been remiss in matters of Jewish
observance – be it a transgression prohibited by the Torah, a rabbinical
prohibition, or even a breach of custom. Such statements are derogatory by
the Torah’s standards and thus are forbidden.
Therefore, it is forbidden to mention an incident in which one of the
people involved transgressed a halachah, even in a society where that
particular halachah is commonly ignored.