23 And he shall bring them on the eighth day for his cleansing unto the priest, unto the door of the tabernacle of the congregation, before the Lord.

24 And the priest shall take the lamb of the trespass offering, and the log of oil, and the priest shall wave them for a wave offering before the Lord:

25 And he shall kill the lamb of the trespass offering, and the priest shall take some of the blood of the trespass offering, and put it upon the tip of the right ear of him that is to be cleansed, and upon the thumb of his right hand, and upon the great toe of his right foot:

26 And the priest shall pour of the oil into the palm of his own left hand:

27 And the priest shall sprinkle with his right finger some of the oil that is in his left hand seven times before the Lord:

28 And the priest shall put of the oil that is in his hand upon the tip of the right ear of him that is to be cleansed, and upon the thumb of his right hand, and upon the great toe of his right foot, upon the place of the blood of the trespass offering:

29 And the rest of the oil that is in the priest’s hand he shall put upon the head of him that is to be cleansed, to make an atonement for him before the Lord.

30 And he shall offer the one of the turtledoves, or of the young pigeons, such as he can get;

31 Even such as he is able to get, the one for a sin offering, and the other for a burnt offering, with the meat offering: and the priest shall make an atonement for him that is to be cleansed before the Lord.

The sacrifices in today’s verses mostly follow the familiar template for a sin and burnt offering, but in addition to the marking of the ear, thumb, and toe with blood, we have oil being applied to each of those body parts as well. We did, of course, already hear about applying blood to the same body parts of a priest before, and the anointing of his head with oil, but this ritual with the leper is the first we are hearing of oil on the ear, thumb, and toe.

Oil is often seen as symbolic of the Holy Spirit, so it could be representative of God’s Spirit impressing the leper’s hearing and actions and walk, though why would the same not be done to the priest? Another thought that occurs to me is that we often see an oily substance come out of our wounds, as well as our blood. Today that oily substance is called serum, and we now know that it is a part of blood. It is the liquid portion that separates out after the cells and clotting proteins form a scab to close the wound. The serum looks like oil and may very well have been interpreted as such by the Ancient Israelites. And it is entirely possible that such blood and oily serum were common sights upon lepers with open wounds and sores. Thus, the ritual application of blood and oil together may be a symbol of both the suffering and the healing of the leper, which suffering tenderized his soul and which healing taught him to rely upon the Lord.

This is a highly specific interpretation, of course, and maybe there are better ones. I do believe that God’s rituals were meant to have many lessons, and perhaps this was one.