LEV620 It is a negative commandment not to shame one's fellow-man as Scripture says, and you shall not bear sin because of him [this verse]; and all the more certainly so in public. It is a great wrong; the Sages of blessed memory said (Talmud Bavli, Baba M'tzi'a 59a): Whoever shames his fellow-man in public has no share in the world-to-come. We must therefore take care not to disgrace anyone, be he of low or high stature. Nor should we call him by any name of which he is ashamed. This applies, however, specifically to a matter between one man and his fellow-man. In matters of Heaven, though, if a person [sinned and he] did not repent when he was rebuked in private, he is to be shamed publicly, and his sin is to be made known in public, until he returns to the good path.