민수기 26:10의 주석

ויהיו לנס AND THEY BECAME A נס — a sign and a reminder in order that no stranger should bring himself near to raise further dispute concerning the priesthood (cf. Numbers 17:5).

ותבלע אותם ואת קרח במות העדה באכול האש, “it (the earth) swallowed them and Korach when the congregation died when the fire consumed them;” the verse introduces the name Korach between the words “it swallowed” and the words “when the fire consumed,” in order to teach us that Korach was both swallowed by the earth and burned by the fire. (I already mentioned this in Numbers 16,30).

A symbol and a reminder. That is to say that the term נס ["banner"] has the connotation of something high [which is visible to all], similar to כנס על הגבעה ["like a banner on top of the hill"] (Yeshayahu 30:17), and כנשוא נס הרים ["a banner raised over the mountains"] (Yeshayahu 18:3).