They took their stand against King Uzziah and said, "Uzziah, you have no right to offer incense to the LORD. Only the priests, the descendants of Aaron, are consecrated to burn incense. Leave the sanctuary, for you have acted unfaithfully; you will not receive honor from the LORD God."
You must distinguish between the holy and the common, between the clean and the unclean, so that you may teach the Israelites all the statutes that the LORD has given them through Moses."
Significance
Leviticus 10:10-11 mandates that priests both distinguish between holy and common and teach Israel accordingly. In 2 Chronicles 26:18, eighty priests confront King Uzziah by applying exactly this mandate: they declare that incense-burning belongs exclusively to the consecrated (הַמְקֻדָּשִׁים, hamequddashim) descendants of Aaron, enforcing the boundary between priestly and royal prerogatives. The priests' willingness to resist the king to his face demonstrates that the teaching mandate includes authoritative enforcement, not merely instruction. Uzziah's resulting leprosy vindicates the priestly boundary and shows that the holy/common distinction of Leviticus 10:10 carries consequences even for those with supreme political power.