This can be translated as a direct quote: "Do not tell anyone" There is implied information that can also be stated explicitly. Alternate translation: "do not tell anyone that you have been healed" (See: [[rc://en/ta/man/translate/figs-quotations]] and [[rc://en/ta/man/translate/figs-ellipsis]])
The law required a person to make a specific sacrifice after they were healed. This allowed the person to be ceremonially clean, and able to again participate in religious rituals.