Following the sin and deaths of Nadav and Avihu, there is a somewhat unclear conversation between Aharon and Moshe regarding Aharon and his remaining sons’ obligation to mourn, and Moshe rebukes them for burning the sacrifice of the Se’ir Hachatat instead of eating it. What is at the root of this dialogue? What is the meaning behind Aharon’s response? A close analysis of the text and some of the classical commentaries reveals several answers to these questions, and also relates to a greater question of Biblical exegesis and the relationship between Oral and Written law.