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
What is meant by “a proof to the people”? It was for their reproof, or as a demonstration or for accusation if they should prove fickle. For since the religious professionals would call him a deceiver and imposter and persecute him as an adversary of God and transgressor of the law, he was prepared to say, “You shall bear witness to me that I am not a transgressor of the law.” The Gospel of Matthew, Homily