Leviticus 16:25 - Ellicott's Commentary On The Whole Bible

And the fat of the sin offering. — That is, the fat of the inwards of both the bullock (see Leviticus 16:6) and the goat (see Leviticus 16:15), which constituted the sin offering, as well as the fat of the other goat, which was the priest’s sin offering, was to be burnt upon the brazen altar of burnt offering in the courtyard. (See Leviticus 4:8-10.)