Halakhah zu Wajikra 7:1

The commandment of the procedure of the guilt-offering: That we were commanded that the priests execute the process of the guilt-offering according to the manner described in Scripture, as it is stated (Leviticus 7:1), "This is the law of the guilt-offering, etc.," as it is written in the passage. Did I not tell you (Sefer HaChinukh 138) that we should not write the root in these processes, since they are similar to the details of the sacrifices - and one should not seek after their reasons, as they are things that are blocked and sealed.