Luke 5:14
Then Jesus ordered him, don't tell anyone, but go, show yourself to the priest and offer the sacrifices that Moses commanded for your cleansing, as a testimony to them — the Messianic Secret command (don't tell anyone) is paired with the Torah instruction (show yourself to the priest). The priestly declaration of cleansing is the official certification of the miracle — as a testimony to them. The system that excluded the leper must officially certify his restoration.