Exodus 29:1-4, 22-23

“This is the ceremony for dedicating them as priests. Take a young bull and two rams, healthy and without defects. Using fine wheat flour but no yeast make bread and cakes mixed with oil and wafers spread with oil. Place them in a basket and carry them along with the bull and the two rams. Bring Aaron and his sons to the entrance of the Tent of Meeting and wash them with water.

“Take the fat from the ram, the fat tail, the fat that covers the innards, the long lobe of the liver, the two kidneys and the fat on them, and the right thigh: this is the ordination ram. Also take one loaf of bread, an oil cake, and a wafer from the breadbasket that is in the presence of GOD.