Moses
Leviticus 14:14ESV·traditional attribution

The priest shall take some of the blood of the guilt offering, and the priest shall put it on the lobe of the right ear of him who is to be cleansed and on the thumb of his right hand and on the big toe of his right foot.

Matthew Henry Presbyterian @wholebiblehenry

Observe, I. To complete the purification of the leper, on the eighth day, after the former solemnity performed without the camp, and, as it should seem, before he returned to his own habitation, he was to attend at the door of the tabernacle, and was there to be presented to the Lord, with his offering, Lev 14:11. Observe here, 1.

Commenting on Leviticus 14:10-20

John Gill Reformed Baptist @doctorgill

And the priest shall take some of the blood of the trespass offering,.... According to the Misnah (r), two priests received the blood of it, one in a vessel and the other in his hand; he that received it in a vessel went and sprinkled it upon the wall (or top, as Maimonides (s)) of the altar; and he that received it in his hand...

Adam Clarke Methodist @methodicalclarke

Upon the tip of the right ear, etc. - See Clarke's note on Exo 29:20.