And Jesus said unto him,
See you tell no man; but go your way, show yourself to the priest, and offer the gift that Moses commanded, for a testimony unto them.
All Commentaries on Matthew 8:4 Go To Matthew 8
John Chrysostom
AD 407
It was an ancient law that the leper when cleansed should not entrust the recognition of his cleansing to private judgment but should show himself to the priest. By this means it would be confirmed in his own eyes, and he could then be numbered among the clean. For if the priest had not corroborated it, he would have remained outside the camp among the unclean. The Gospel of Matthew, Homily