Moses
Exodus 29:20ESV·traditional attribution

and you shall kill the ram and take part of its blood and put it on the tip of the right ear of Aaron and on the tips of the right ears of his sons, and on the thumbs of their right hands and on the great toes of their right feet, and throw the rest of the blood against the sides of the altar.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. The law concerning the consecration of Aaron and his sons to the priest's office, which was to be done with a great deal of ceremony and solemnity, that they themselves might be duly affected with the greatness of the work to which they were called, and that the people also might learn to magnify the office and none might dare to invade it. 1.

Commenting on Exodus 29:1-37

John Gill Reformed Baptist @doctorgill

Then shall thou kill the ram,.... As the other: and take of his blood, some part of it being received into a basin: and put it upon the tip of the right ear of Aaron, and upon the tip of the right ear of his sons; according to Jarchi, this is the middle gristle within the ear; but Saadiah more rightly says it is the...

Geneva Bible Notes Reformed @genevanotes

Then shalt thou kill the ram, and take of his blood, and put [it] upon the tip of the right ear of Aaron, and upon the tip of the right ear of his sons, and upon the thumb of their right hand, and upon the great toe of their right foot, and sprinkle the blood upon the altar round about. (e) Meaning the soft and lower part of the ear.