Numbers 26:11 - Coke's Commentary on the Holy Bible

Notwithstanding, the children of Korah died not— The Jews have a tradition, that while Korah's sons were in their father's tent, soliciting him to desist from his rebellion, on a sudden the earth swallowed up Korah, and left his sons unhurt. Conformable to which tradition, the Vulgate joins the latter part of the 10th with this verse: and lo! a sign, or miracle, was wrought; for whereas Korah himself perished, his sons perished not. However, be that matter as it may, the preservation of Korah's children must be looked upon as a miracle, and as a mark of the Divine goodness, who, in the midst of judgment, remembered mercy. Korah's became a considerable branch of the Levitical family; for they were famous in David's time.