Rashi on Leviticus 16:13/רש"י על ויקרא ט״ז:י״ג

1על האש UPON THE FIRE which was in the censer.

2ולא ימות THAT IIE DIE NOT — Hence, if he did not offer it according to regulation he was liable to the death penalty (Sifra, Acharei Mot, Chapter 3 10; Yoma 53a).