LEV579 "You shall rebuke your neighbor) and you shall not bear sin because of him" This versus prohibits us from embarrassing others even when privately delivering rebuke (Erchin 16b). Rebuke must be delivered in a tactful manner that will not cause shame. If you speak loshon hora about a person in his presence and caused him shame, you violate this prohibition. If you shame someone in public, the crime is so severe that it is punishable by the loss of olam haboh (Bava Metzia 59a).