(KJV) 2 Chronicles 26:16-19

> 
> 16 But when he was strong, his heart was lifted up to his destruction: for he transgressed against the LORD his God, and went into the temple of the LORD to burn incense upon the altar of incense. 17 And Azariah the priest went in after him, and with him fourscore priests of the LORD, that were valiant men: 18 And they withstood Uzziah the king, and said unto him, It appertaineth not unto thee, Uzziah, to burn incense unto the LORD, but to the priests the sons of Aaron, that are consecrated to burn incense: go out of the sanctuary; for thou hast trespassed; neither shall it be for thine honour from the LORD God. 19 Then Uzziah was wroth, and had a censer in his hand to burn incense: and while he was wroth with the priests, the ***leprosy*** even rose up in his forehead before the priests in the house of the LORD, from beside the incense altar.
> 
> 
> 

(KJV) Leviticus 10:1-2

> 
> 1 And Nadab and Abihu, the sons of Aaron, took either of them his censer, and put fire therein, and put incense thereon, and offered strange fire before the LORD, which he commanded them not. 2 And there went out fire from the LORD, and devoured them, and they ***died*** before the LORD
> 
> 
> 

Emphasis added. 

In the above texts it seems King Uzziah committed a similar offense to Nadab & Abihu but was not punished like the sons of Aaron.

Did God show lenience to Uzziah?