2 Chronicles 26:16, 19

But when Uzziah became strong, he became so proud [of himself and his accomplishments] that he acted corruptly, and he was unfaithful and sinned against the LORD his God, for he went into the temple of the LORD to burn incense on the altar of incense. [Num 3:38]

Then Uzziah, with a censer in his hand to burn incense, was enraged; and while he was enraged with the priests, leprosy broke out on his forehead before the priests in the house of the LORD, beside the incense altar.