Leviticus 8:24-25

²⁴Then Moses had Aaron and his sons come forward and put some of the blood on their right earlobes, on the thumbs of their right hands, and on the big toes of their right feet. Then he sprinkled blood on all sides of the altar.

²⁵Moses took the fat, including the fat tail, all the fat on the insides, the best part of the liver, both kidneys with the fat on them Moses took the fat—together with the right thigh.