Leviticus 8:23-24

And he slew it; and Moses took of the blood thereof, and put it upon the tip of Aaron’s right ear, and upon the thumb of his right hand, and upon the great toe of his right foot. And he brought Aaron’s sons; and Moses put of the blood upon the tip of their right ear, and upon the thumb of their right hand, and upon the great toe of their right foot: and Moses sprinkled the blood upon the altar round about.