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."
Now Aaron's sons Nadab and Abihu took their censers, put fire in them and added incense, and offered unauthorized fire before the LORD, contrary to His command.
Significance
Nadab and Abihu offered אֵשׁ זָרָה (esh zarah, "unauthorized/strange fire") before the LORD in Leviticus 10:1 and were consumed by divine fire, establishing the lethal consequence of violating priestly boundaries. King Uzziah's attempt to burn incense in 2 Chronicles 26:16-18 reprises the same transgression — both narratives involve unauthorized persons approaching the altar of incense with censers. The priests confront Uzziah with the Levitical principle itself: incense-burning belongs exclusively to the consecrated sons of Aaron. The verbal tie is an echo at the level of the shared incense root (קטר) rather than a shared formula — the two accounts even use different words for the censer. While Nadab and Abihu were priests who used wrong fire, Uzziah was a king who usurped a priestly function entirely, and his punishment (leprosy rather than death) shows the Chronicler presenting an analogical reprise of the same boundary violation.