Leviticus 8:24-25

²⁴He offered also the sons of Aaron: and when with the blood of the ram that was immolated, he had touched the tip of the right ear of every one of them, and the thumbs of their right hands, and the great toes of their right feet, the rest he poured on the altar round about:

²⁵But the fat, and the rump, and all the fat that covereth the entrails, and the caul of the liver, and the two kidneys with their fat, and with the right shoulder, he separated.