Leviticus 9:18

He slew also the bullock and the ram for a sacrifice of peace offerings, which was for the people: and Aaron’s sons presented unto him the blood, which he sprinkled upon the altar round about,

Aaron slew the bullock and the ram as a peace offering for the people. His sons presented the blood to him, and he sprinkled it all around upon the altar. This peace offering stood among the sacrifices that God Himself had commanded. It was accepted by Him and consumed by fire from the Lord, revealing His glory.