Leviticus 8:23-24

231And Moses slaughtered it and took some of its blood and 2put it on the lobe of Aaron’s right ear, and on the thumb of his right hand and on the big toe of his right foot.

24He also had Aaron’s sons come near; and Moses put some of the blood on the lobe of their right ear, and on the thumb of their right hand and on the big toe of their right foot. Moses then 3sprinkled the rest of the blood around on the altar.