We believe you are referring to Leviticus 8:30-31, “Then Moses took some of the anointing oil and some of the blood from the altar and sprinkled them on Aaron and his garments and on his sons and their garments. So he consecrated Aaron and his garments and his sons and their garments.
Moses then said to Aaron and his sons, ‘Cook the meat at the entrance to the Tent of Meeting and eat it there with the bread from the basket of ordination offerings, as I commanded, saying, “Aaron and his sons are to eat it.”’” This “eating” represents a fellowship meal with God. The “meat” was from a ram and was to be boiled. The priests ate it during the days of their consecration ceremony. The “eating” did not begin the process of consecration. It came after the washing, the clothing, and the blood-atonement of the priests. The eating speaks of the continuing relationship of the priest with God. The consecration of the priesthood represents a greater picture of the Christian’s consecration, teaching that our consecration is accepted only because we are justified by the precious blood of our Redeemer, Jesus. Therefore, the eating of the flesh of the ram of consecration and the bread in the basket (see Exodus 29:32) has the same significance for the Christian as appropriating the merits of the man Christ Jesus.