Exodus 29:19-20

19“You shall also take the other ram, and Aaron and his sons shall put their hands on the head of the ram.

20Then you shall kill the ram, and take some of its blood and put it on the tip of the right ear of Aaron and on the tip of the right ear of his sons, on the thumb of their right hand and on the big toe of their right foot, and sprinkle the blood all around on the altar.