Musar על במדבר 16:27

This is the language of the Midrash Rabbah on Korach: "R. Berechiah said: 'How severe is machloketh! For the upper beth-din punishes only from twenty years and above, and the lower beth-din from thirteen and above; but in the machloketh of Korach, one-year-old infants were swallowed up in the depths of Sheol, as it is written (Numbers 16:27): '…and their wives and their sons and their infants… (Ibid. 33): …went down — they and all that was theirs, alive into Sheol.'"