John Calvin Commentary Leviticus 7:37

"This is the law of the burnt-offering, of the meal-offering, and of the sin-offering, and of the trespass-offering, and of the consecration, and of the sacrifice of peace-offerings;" — Leviticus 7:37 (ASV)

This is the law of the burnt-offering. In this conclusion, Moses indicates that full provision had been made to prevent any addition from human inventions from subtly entering and corrupting the sacrifices. He says that on the day God appointed the sacrifices to be offered to Him on Mount Sinai, He omitted nothing which was to be observed, so that men would not dare to introduce anything except what He prescribed.

And surely, when He had thus carefully included all the ceremonies, we may easily infer from this how earnestly we should avoid all rashness and presumption in invention. The purpose, therefore, of Moses in this brief admonition was to urge the people to seriousness and self-control, so that they would not transgress the limits placed by God.