When we read through the book of Leviticus, we see God mandating what is necessary to do in the various sacrifices and offerings that are brought to Him. He also talks about what was to be done with the entrails, skin, dung, and other aspects of the animals that people tend to forget when reading about sacrifices (Lev. 4:11-12, 8:17, 9:11, 16:27-28; Num. 19:1-10).