Les Nombres 17:4 Midrash : Midrash Tanchuma Buber

(Lev. 8:3:) AND ASSEMBLE THE WHOLE CONGREGATION. The Holy One said to Moses: Pay him honor in front of all Israel, in order that they may see him when he enters the High Priesthood.⁴⁶Tanh., Lev. 2:11. In addition, you are to warn them not to rebel against the priesthood like Korah and his crowd (in Numb. 16:1–35). For I know that Uzziah is going to arise and rebel against the Priesthood (in II Chron. 26:16–21). Thus it is stated (in Numb. 17:5 [16:40]): IT WAS TO BE A REMINDER TO THE CHILDREN OF ISRAEL THAT NO OUTSIDER < WHO WAS NOT OF AARON'S SEED > SHOULD DRAW NEAR < TO OFFER INCENSE BEFORE THE LORD >…. He (i.e., Uzziah) was not of Levi's seed just as Korah was < not of Levi's seed >. It (i.e., the altar covering of Numb. 17:4 [16:39]) gave him a reminder: What you did to Korah you would do to him. It said to him (ibid., cont.): LET HIM NOT BE LIKE KORAH AND HIS CROWD. He said to it: And how did you act toward him? It said to him (ibid., cont.): AS THE LORD SPOKE TO HIM THROUGH MOSES. He (the Holy One) said to him (Moses): Just as I did to your hand (in Exod. 4:6): AND WHEN HE WITHDREW IT {FROM HIS BOSOM}, BEHOLD IT WAS LEPROUS, < AS WHITE > AS SNOW; so will I do to him (in II Chron. 26:20–21). Therefore (in Lev. 8:3): AND ASSEMBLE THE WHOLE CONGREGATION.