Leviticus 8:23-24

23Moses slaughtered it, took some of its blood and put it on the tip of Aaron’s right ear, on the thumb of his right hand and on the great toe of his right foot.

24Then Moses brought Aaron’s sons and put some of the blood on the tips of their right ears, on the thumbs of their right hands and on the great toes of their right feet. Then Moses splashed the blood around on the altar.