Targum sobre Números 17:5

for a memorial to the sons of Israel, that no common man, who is not of the sons of Aharon, may offer incense before the Lord; and that no man should behave himself factiously to obtain the priesthood, as did Korach and the company of his helpers; and whose end would be to perish, not (indeed) with a death like that of Korach and his company, by being burned by fire, and being swallowed up by the earth, but punished with leprosy: as when the Lord said to Mosheh, Put thy hand into thy bosom, and his hand was stricken with leprosy; so would it be with him.