Matthew Poole and continuators on Deuteronomy 24:8

8 Take heed in the plague of leprosie, 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.

By which words he plainly intimates, that they were not onely to have an eye to the Levites instructions, but also and especially unto the word and command of God, and that if the Levites sentence were manifestly contrary to the command of God, it were not to be obeyed. As now if a Levite or Priest should for fear or favour or gain pronounce a person to be clean who were really and manifestly unclean, and had the unquestionable marks of leprosie upon him, I suppose no man in his wits will question, but every man that saw and knew this were bound to avoid the touching of him, and that if he did touch him he should be defiled by it.

Marginal references: Lev. 13. & 14.