Read Luke 5:14 Using Other Translations
And he charged him to tell no man: but go, and shew thyself to the priest, and offer for thy cleansing, according as Moses commanded, for a testimony unto them.
And he charged him to tell no one, but "go and show yourself to the priest, and make an offering for your cleansing, as Moses commanded, for a proof to them."
Then Jesus instructed him not to tell anyone what had happened. He said, “Go to the priest and let him examine you. Take along the offering required in the law of Moses for those who have been healed of leprosy. This will be a public testimony that you have been cleansed.”