Commentary for Numbers 16:32

AND ALL THE MEN THAT APPERTAINED UNTO KORACH. He [Korach] had acquired [heathen] slaves and bondmaids, and had as members of his household Egyptians, Ethiopians, and Canaanites — the purchase of his money¹⁶⁵Leviticus 22:11. — and these people were punished because they were part of their goods [i.e., those of Korach’s men], for they were punished both personally and in their belongings. Perhaps there were also in Korach’s house Israelites as sojourners and residents, and they were influenced by his counsel and were therefore punished [with Korach]. But it [the phrase all the men that appertained unto Korach] cannot refer to his children, for it is written, But the children of Korach died not,¹⁶⁶Further, 26:11. because they were adults, righteous and good men, and their [own] merit stood in their stead [so that they were not swept away with their father]. He had no minor sons and daughters, since Scripture does not mention “little ones” in the case of Korach [as it does when referring to Dathan and Abiram].¹⁶⁷Above, Verse 27.

ותפתח הארץ את פיה, the fissure in the surface of the earth became wide enough to extend all the way to their houses.

ואת כל האדם אשר לקרח, “and all the people who had joined Korach.” According to Nachmanides this included the servants and maids in Korach’s household who were bodily owned by him. Perhaps he had Jewish helpers in his household also, as well as some proselytes. They could have suffered the same fate as they supported him. It is not possible to understand the words “and every person belonging to him,” as referring to members of his immediate family, seeing that his grown up sons did not die, as the Torah has spelled out elsewhere. (Numbers 26,11) His younger children surely were included in the wordsותבלע אותם ואת בתיהם “it swallowed them and their households.” Or, he had no children that were minors, as the Torah would have mentioned them under the heading of טף.