민수기 16:2의 Musar

Another problem is that Rashi writes that the prince Elitzur ben Shedeyur and some of his asscociates of the tribe of Reuben, was one of these two hundred and fifty men! Rabbeynu Bachyah writes on this subject that even the princes who had offered the 12 offerings described in Parshat Nasso were part of the two hundred and fifty men. Our sages further point out that in one place these men were described as קריאי מועד, and in another place as נשיאי העדה. In Parshat Bamidbar 1,16, they are referred to as קרואי העדה, נשיאי מטות אבותם. We know from Numbers 26,9, that the term קריאי העדה is used by the Torah for people who had provoked Israel into rebellion against G–d. It is certainly mindboggling to think that people of such calibre who had witnessed all these miracles should forfeit their standing as holy people by joining such a self-seeking rebellion. When we think of someone like Nachshon ben Aminadav who had risked his life being the first to enter the sea before it had even split, it is quite inconceivable that he should have lowered himself to such a degree! On the contrary, we find that Nachshon's merit even helped his descendants long afterwards, since our sages say that it did not prove helpful anymore to Elimelech the husband of Naomi in the book of Ruth, since the latter emigrated from the land of Israel (Baba Batra 91a).

And, in Yalkut Korach: "Come and see what machloketh does. For 'machloketh' acronymically (without the vav) is 'Makkah' [a blow], 'Charon' [wrath], 'Likui' [defect], 'K'lalah' [a curse], 'Tachgith' [destruction (klayah)] to the world." And according to the greatness of the eminence of the man of machloketh, so will be his punishment (as we find in Tanna d'bei Eliayhu 18). And, therefore, it is written in Parshath Korach (Numbers 16:2): "…chiefs of the congregation, designates of the time, people of name" — to emphasize the greatness of their sin.