King James Version
Take heed in the plague of leprosy, that thou observe diligently, and do according to all that the priests the Levites shall teach you: as I commanded them, so ye shall observe to do.English Standard Version
"Take care, in a case of leprous disease, to be very careful to do according to all that the Levitical priests shall direct you. As I commanded them, so you shall be careful to do.New International Version
In cases of leprous diseases be very careful to do exactly as the priests, who are Levites, instruct you. You must follow carefully what I have commanded them.