Moses
Exodus 29:14ESV·traditional attribution

But the flesh of the bull and its skin and its dung you shall burn with fire outside the camp; it is a sin offering.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. The law concerning the consecration of Aaron and his sons to the priest's office, which was to be done with a great deal of ceremony and solemnity, that they themselves might be duly affected with the greatness of the work to which they were called, and that the people also might learn to magnify the office and none might dare to invade it. 1.

Commenting on Exodus 29:1-37

John Gill Reformed Baptist @doctorgill

But the flesh of the bullock, and his skin, and his dung,.... The several parts and members of him, head, legs, feet, &c. and the skin taken off of him, and the dung that comes from him. Aben Ezra observes, that the flesh comprehends the head and the pieces, and may be interpreted in a way of conjecture, that he washed it, and afterwards burnt...

Adam Clarke Methodist @methodicalclarke

It is a sin-offering - See Clarke's note on Gen 4:7; See Clarke's note on Gen 13:13; See Clarke's note on Lev 7:1, etc.