לֹֽא־תִשְׂנָ֥א אֶת־אָחִ֖יךָ בִּלְבָבֶ֑ךָ הוֹכֵ֤חַ תּוֹכִ֙יחַ֙ אֶת־עֲמִיתֶ֔ךָ וְלֹא־תִשָּׂ֥א עָלָ֖יו חֵֽטְא׃
Janganlah engkau membenci saudaramu di dalam hatimu; engkau harus benar-benar menegur sesamamu, dan janganlah engkau menanggung dosa karena dia.
Sha'arei Teshuvah
The twentieth principle is to cause the many to repent from iniquity to the extent of one's ability - as it is stated (Ezekiel 18:30), "Repent and make repent from all your transgressions." We learn [from this] that it is from the principles of repentance. And it is stated (Leviticus 19:17), "you shall surely reprimand your countryman and not bear sin because of him." We learn [from this] that if he does not rebuke him, he will be punished for [the other's] sins. And King David, peace be upon him, said in the psalm of repentance (Psalms 51:15), "I will teach transgressors Your ways, that sinners may return to You."
Shemirat HaLashon
First of all, the episode of the serpent, who spoke lashon hara of the Holy One Blessed be He and thereby brought death to the world. And (Bereshith 29:20): "If G-d will be with me and guard me," concerning which Chazal have said: "if He will guard me against lashon hara." And the episode of Joseph (Ibid. 37:2): "And Joseph brought their evil talk to their father," this being the catalyst of the descent of the Jews to Egypt. And (Shemoth 2:14): "In truth, the thing has become known" (see Rashi there and what we shall write below). There, too, (4:1) Moses our teacher, may peace be upon him, says: "But they will not believe me," and the Blessed L-rd counters (Ibid. 2): "What is this in your hand?" … (3) …and it became a serpent." Also there (6): "And, behold, his hand was leprous as snow." And (Ibid. 17:2): "And the people quarreled with Moses… (7) …over the quarrel of the children of Israel, etc." followed by (8): "And Amalek came and warred with Israel, etc." And (Ibid. 23:1): "You shall not bear a false report, which applies to both the speaker and the receiver [of lashon hara] (as we find in Makkoth 23a), followed by (2): "Do not be after many to do evil." And, in reference to the me'il [the outer robe of the ephod] (Ibid. 28:32): "A border shall there be to its mouth roundabout," and the entire section. And (35): "And its sound will be heard when he comes to the sanctuary, etc." And the entire section of Tazria and Metzora: the plague-spots of houses, the plague-spots of clothing, the plague-spots of men, (Vayikra 13:46): "Solitary shall he sit"— even outside of the camp of Israel. And his atonement— "chirping" birds. And (Ibid. 19:16): "Do not go talebearing among your people," (Ibid. 17): "Reprove, shall you reprove your neighbor, but you shall not bear sin because of him." And (Ibid. 25:17): "You shall not wrong, one man, his fellow," which relates to verbal wronging, which is also in the category of evil speech. And (Bamidbar 5:1): "And they shall send out of the camp every leper"— even if he were as great in Torah as Doeg. And (Ibid. 12:1): "And Miriam and Aaron spoke against Moses, etc." And the entire section of Shelach Lecha, which speaks about the spies. And (Ibid. 21:5): "And the people spoke against G-d and against Moses." And (Devarim 23:10): "When you go out as a camp against your foes, guard yourself against every evil thing [davar ra]," concerning which Chazal have said: "davar ra" may be read as "dibbur ra" [evil speech]. And in Tetze, the "giving out of an evil name [motzi shem ra]," and (Ibid. 24:9): "Remember what the L-rd your G-d did to Miriam, etc." And (Ibid. 27:24): "Cursed be he who smites his friend in secret," which refers to lashon hara. And it is known that all of the "cursings" were preceded by blessings; and they opened with blessing, saying: "Blessed is he who does not smite"— whence we derive that one who is heedful in this is blessed.
Orchot Tzadikim
And one should be very careful not to shame any man for the Sages said: "He who whitens (shames) the face of another in public has no portion in the world to come" (Baba Mezià 59a). To whiten another's face is like murder, for the red departs and the white comes (thus one is spilling the blood of the shamed one within him) (Ibid., 58b). And the Sage said further: The pain of shame is worse than death. A person should allow himself to be burnt alive and not shame his fellow in public. And they learned this from Tamar who, even though they brought her forth to be burned, did not want to shame Judah (Berakoth 43b). And even when you are required to rebuke another the Torah says: "You shall surely rebuke your neighbor and not bear sin because of him" (Lev. 19:17). How shall you rebuke? At first, secretly and gently. However if you rebuke him at the beginning in public and shame him, then you have sinned because of this, (Arakin 16b). And this is all the more true where one shames another where no rebuke is called for.