Leviticus 14:14
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:
This verse belongs to the ceremonial, priestly law given through Moses for a person cleansed of leprosy, who had been declared unclean and separated from family and society. The law required the healed person to go to the priest, show himself for thorough examination, present the prescribed offerings for cleansing, and receive a public proclamation that he was entirely free from infectious disease, in sound health, and might safely reunite with family, friends, and the congregation. The priest could not accept the offering without first making that examination and certification.
These offering ceremonies were types whose significance became clear in Christ's death, when type met antitype. Jesus directed the healed man to follow this law and present the offering Moses commanded, thereby upholding the law requiring offerings. That direction showed that His teaching and action were not opposed to the law of Moses, the Jewish code.
That obedience made the offering and examination a testimony before the priests, forcing them to publicly confirm the cure and certify the man. It answered the charge, notably from the Pharisees, that Jesus opposed the law. It set before them irrefutable, standing proof of divine healing, power, and love.