Exodus 29:20
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.
Cross-reference
Exodus 24:6 describes Moses sprinkling blood on the people to ratify the covenant, a parallel act of blood application for consecration.
Leviticus 8:24 records the actual performance of this command – Moses applies blood to the right ear, thumb, and big toe of Aaron and his sons.
1 Peter 1:2 speaks of the sprinkling of Jesus' blood, directly connecting the new covenant purification to the old ritual of consecration.
Leviticus 8:23 records the actual performance of this command — Moses putting blood on Aaron's ear, thumb, and toe — the same ritual.
Leviticus 14:14 uses the same blood application on ear, thumb, and toe for cleansing a leper, extending the consecration symbolism to purification.
Leviticus 14:17 applies oil to the same body parts for a leper's cleansing — a structural parallel using oil instead of blood for purification.