Leviticus 14:12-18
12 And the priest shall take one he lamb, and offer him for a trespass offering, and the log of oil, and wave them for a wave offering before the LORD:
13 And he shall slay the lamb in the place where he shall kill the sin offering and the burnt offering, in the holy place: for as the sin offering is the priest's, so is the trespass offering: it is most holy:
14 And the priest shall take some of the blood of the trespass offering, and the priest shall 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:
15 And the priest shall take some of the log of oil, and pour it into the palm of his own left hand:
16 And the priest shall dip his right finger in the oil that is in his left hand, and shall sprinkle of the oil with his finger seven times before the LORD:
17 And of the rest of the oil that is in his hand shall the priest put 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 blood of the trespass offering:
18 And the remnant of the oil that is in the priest's hand he shall pour upon the head of him that is to be cleansed: and the priest shall make an atonement for him before the LORD.
Lev. 14:12-18. The sacrifice was to be offered to God with oil. They were to be waved together before the Lord, and after the Lamb was slain, and his blood shed before the Lord, the Priest was to sprinkle of the oil seven times before the Lord. So the sacrifice of Christ was offered up to God with the Spirit, with Divine love, love to God and love to men, which sanctified the sacrifice and made it effectual. Both the blood and the oil were first offered to God before they were applied to the leper. So not only is Christ's blood first presented to God before it is applied to the sinner, but the spirit of love that He had without measure first flows out to God, before it flows out to the sinner, and be communicated to him in sanctification. In the application, both the blood and oil are applied to the right ear of him that was to be cleansed, to cleanse the ear, by which men hear and listen to the commands and counsels of God, and the offers and invitations of the gospel; and the thumb, the chief part of the right hand, to cleanse the hands by which we work; and to the chief part of the right foot, to cleanse the feet by which we walk. The application of the blood is to cleanse from the guilt of sins of the ear or heart, and of the hands or works of the hands, and of the feet as the way to walk. The application of the oil which followed signifies the sanctification of them by the Holy Spirit. The blood and oil were first applied to the ear, hand, and foot, and then afterwards oil was poured on the head of the leper, to signify that persons are first justified, then sanctified, and then glorified, as pouring oil on the head was used as a token of initiation to some high and honourable office and great dignity, as that of prophet, priest, or king, as the saints when glorified are made kings and priests unto God; and as the ear is sanctified to hear God's commands, and the hands to do God's work, and the feet to walk in God's way before the pouring oil on the head, it shows that a holy conversation is the only way to glory.