Leviticus 8:23-24

And when Moses had immolated it, he took of the blood thereof, and touched the tip of Aaron's right ear, and the thumb of his right hand, and in like manner also the great toe of his right foot.

He 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.