Deuteronomy 24:8,9

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.

Take heed in the plague of leprosy (see the note at Leviticus 13:14) - avoid all occasion of contracting that dreadful disease, especially in the way of punishment for disobedience, like Miriam; but in the event of being overtaken by it, be implicitly subject to the counsels and instructions of the Levites, who were divinely directed what remedies to prescribe.