(16:1) Korach son of Yitzhar son of Kehat and great-grandson of Levi took [the right to himself] together with Datan and Abiram, sons of Eliav, and On son of Pelet, sons of Reuben.
Korach … took What did he take? Resh Lakish said: He took— that is, he made—a bad deal for himself (Sanhedrin 109b).
NOTE: According to the Midrash, the wealthy Korach spent a great deal of money to bribe and wine and dine his fellow conspirators in an attempt to make them join his rebellion. It turned out to be a very bad investment.
(16:4) When Moses heard, he fell on his face.
When Moses heard What news did Moses hear that caused him to fall on his face? R. Shmuel b. Nachmani said: He heard that the people suspected him of adultery, as it says “They forewarned their wives concerning Moses in the camp” (Psalms 106:16). This teaches us that every husband formally warned his wife against secluding herself with Moses because they suspected their wives of committing adultery with him. And so it