Leviticus 9:10
But the fat, and the kidneys, and the caul above the liver of the sin offering, he burnt upon the altar; as the LORD commanded Moses. But the fat, and the kidneys, and the caul above the liver of the sin offering, he burnt upon the altar; as the LORD commanded Moses.
Aaron burned the fat with the kidneys and the caul above the liver of the sin offering upon the altar in exact fulfillment of what the Lord had commanded through Moses. That careful keeping of the prescribed order belonged to the sacrificial service which God accepted. Fire came forth from the Lord and consumed the offering in the sight of the assembled people. That consuming fire was a public manifestation of His glory and a token of His favor toward obedient worship.