וַיְדַבֵּ֨ר אֶל־הָעֵדָ֜ה לֵאמֹ֗ר ס֣וּרוּ נָ֡א מֵעַל֩ אָהֳלֵ֨י הָאֲנָשִׁ֤ים הָֽרְשָׁעִים֙ הָאֵ֔לֶּה וְאַֽל־תִּגְּע֖וּ בְּכָל־אֲשֶׁ֣ר לָהֶ֑ם פֶּן־תִּסָּפ֖וּ בְּכָל־חַטֹּאתָֽם׃
E Moshe disse: "Com isto sabereis que foi o Eterno Quem me enviou para fazer todas essas obras, e que não procedem do meu coração.
Ramban
Before Moses commenced the explanation of the Torah he began to reprove them, reminding them of their sins, How oft did they rebel against Him in the wilderness,11Psalms 78:40. and how the Holy One, blessed be He, conducted Himself towards them with the attribute of mercy. This was to inform them of His mercies towards them; also, that they be chastised by his words so that they would not revert to their degradation lest they be swept away in all their sins,12Numbers 16:26. and [finally] to strengthen their hearts by informing them that He will always conduct Himself towards them with the attribute of mercy, and hence a person should not feel that he will not be able to inherit the Land because — since there is no person that does not sin13See Ecclesiastes 7:20. — the attribute of judgment would at once be aimed against him and he would be destroyed. Therefore Moses our teacher informed them that the Holy One, blessed be He, is the Merciful One, full of mercy, since the forgiveness and pardon which come from Him, blessed be He, are an assistance and help to people in serving Him, similar to what Scripture says, For with Thee is forgiveness, that Thou mayest be feared.14Psalms 130:4. G-d forgives in order to turn man’s heart towards Him in reverence, for, without Divine pardon, man would be in constant fear of being lost in his sin and therefore incapable of revering Him.
Sforno
והוא לא היה, he was not a member of the rebellious people who had made common cause with Korach. Those people had been banished by Moses, i.e. disinherited by him, deprived not only of potential property but even of all their actual belongings, as we have been told in Numbers 16,26. The words כל הרכוש in verse 32 of that chapter make clear that they had forfeited all claims to anything.
Tosafot Yom Tov
YOU SHOULD IMAGINE THEM TO BE WICKED. But do not imagine the two of them to be righteous people, because then you will not thoroughly examine their claims and will charitably interpret everything they say without investigating the case in depth. When one imagines them both to be wicked, one thoroughly examines each one’s claims and considers possible avenues of deception, thereby getting to the truth of the matter.
Another possible interpretation. One of the parties has certainly acted unlawfully, and the Talmud considers the other party similarly implicated, as per the passage discussing oaths in court (Shavuot 39a): those standing there then say to one another, “Step away from the tents of these evil men!” (Numbers 16:26), and there also (ibid. 39b): “The oath of G-d will be taken between them” (Exodus 20:10), this teaches that the oath falls on both of them, i.e., even the party in the right, all because he is involved in a case with the criminal party. They are thus both called “wicked.” When they accept the court’s ruling, however, they are both called “righteous,” because accepting a ruling after their quarrel with one another is an act of righteousness on their part—Maharal in Derech Chaim.
Another possible interpretation. One of the parties has certainly acted unlawfully, and the Talmud considers the other party similarly implicated, as per the passage discussing oaths in court (Shavuot 39a): those standing there then say to one another, “Step away from the tents of these evil men!” (Numbers 16:26), and there also (ibid. 39b): “The oath of G-d will be taken between them” (Exodus 20:10), this teaches that the oath falls on both of them, i.e., even the party in the right, all because he is involved in a case with the criminal party. They are thus both called “wicked.” When they accept the court’s ruling, however, they are both called “righteous,” because accepting a ruling after their quarrel with one another is an act of righteousness on their part—Maharal in Derech Chaim.