Leviticus 8:22-23

²²and Moses took of his blood, and put it upon the tip of Aaron’s right ear, and on the thumb of his right hand, and on the great toe of his right foot.

²³And Moses brought near the sons of Aaron; and Moses put of the blood on the tips of their right ears, and on the thumbs of their right hands, and on the great toes of their right feet, and Moses poured out the blood on the altar round about.