«... It was Korach who conspired with Dathan and Abiram of the tribe of Reuben to lead a rebellion against Moses. Dissatisfied with the honor of performing the duties reserved for the Levites, Korach accused Moses of usurping the leadership and priestly roles for himself and his brother Aaron. (Numbers 16:3). As a result of Korach's challenge to the leadership of Moses, the earth opened up and swallowed him and his followers, including Dathan and Abiram and their households (16:28-34).
In telling the story of Korach (Numbers chaps 16-17), the Torah makes no mention of the fate of his sons. Only later in the book, in the course of reporting the results of the census taken of the Jewish people in anticipation of their entry into the Land of Israel, does the Torah mention them specifically. The Torah at that point relates the census of the tribe of Reuben, including the branches of that tribe that would have come from Dathan and Abiram. The Torah then relates: "These are the same Dathan and Abiram, chosen in the assembly, who agitated against Moses and Aaron as part of Korach's band when they agitated against the Lord. Whereupon the earth opened its mouth and swallowed them up with Korach …The sons of Korach, however, did not die." (26:9-11, JPS translation).
Why didn't the sons of Korach die?»
The Psalm and the Shofar: A Thought for Rosh Hashanah | Douglas Aronin | The Blogs | The Times of Israel