Numbers 27:3

But died in his own sin The sin for which he alone was to suffer in his person, and not in his posterity, meaning, as some think, that incredulity for which all that generation was sentenced to die in the wilderness; and which, though, with respect to the rest of the people, it was not merely his own sin, since they were generally alike guilty; yet with respect to his children it was his own sin, a personal guilt, which God himself had declared should not affect his children, Numbers 14:31.

But, perhaps, by his dying in his own sin, we are only to understand that he died by a common ordinary death, not such a one as they shared who were partakers of the guilt of Korah and his companions.