Even when Tamar faced execution because she was suspected of harlotry, she did not announce in public who the father of her child was; rather, she merely alluded to his identity, leaving him the choice to identify himself or not. The Sages derive from this the severity of shaming another.

The verse relates concerning Tamar: “She was taken out, and she sent to her father-in-law, saying: By the man whose these are I am with child” (Genesis 38:25). But let her tell Judah that he was the father…Evidently, it is preferable for a person to hurl himself into a fiery furnace than to shame another in public. From where is this derived? From the actions of Tamar, [who preferred to die rather than shame Judah in public]. (Sota 10b)