‘THE BLOOD AND THE OIL AS TYPES
Also in the cleansing of the leper, the blood was first placed “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.” And then the oil was put on the places where the blood had been applied. Lev. 14:14-17. The oil upon the blood shows that we must have the blood of Jesus applied to our hearts before we receive the Spirit’s work in our lives. If this oil represents the Spirit’s work at conversion, which it doubtless does, the type has more to teach us. “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.” v.18. This typifies the anointing of the Holy Spirit which comes at the baptism in the Spirit.
THE OIL IN AND UPON THE MEAN OFFERING AS A TYPE
In the meal offering of Leviticus 2, the same truth is taught. “And if the oblation be a meat offering baken in a pan, it shall be of fine flour mingled with oil. Thou shalt part it in pieces, and pour oil theron: it is a meat-offering.” vv. 5, 6. Oil in the cake (the Holy Spirit at conversion), and oil poured upon it (the Holy Spirit at the Baptism).’
Source: Ralph M. Riggs, The Spirit Himself (1949), Chapter 7: The Baptism in the Holy Spirit distinguished from Conversion, p. 56-57.