Deuteronomy 24:8-9 -

The law concerning the leprosy is in Leviticus 13:1-59 ; Leviticus 14:1-57 . By this law the priests are directed how to proceed with those afflicted with leprosy; and here the people are counseled by Moses to follow the directions of the priests in this case, however painful it might be for them to submit to the restrictions that would be thereby imposed upon them, remembering what the Lord did to Miriam the sister of Moses, how even she was separated from the camp by the express command of God until she was healed ( Numbers 12:14 ). Michaelis, Keil, and others, following the Vulgate (" Observa diligenter ne incurras plagam leprae sed facies quaecunque docuerint to sacerdotes "), understand this passage as inculcating obedience to the priests, lest leprosy should be incurred as a punishment for disobedience. But it is improbable that a general counsel to submit to the priests should be introduced among the special counsels here given; and besides, the formula הִשָּׁמֶר בְ means, "Take heed to yourself in respect of" (cf. 2 Samuel 20:10 ; Jeremiah 17:21 ), rather than "Beware of," or "Be on your guard against."