Deuteronomy Chapter 24, Verse 8

8: 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.- edit KJV text
8: Observe diligently that thou incur not the stroke of the leprosy, but thou shalt do whatsoever the priests of the Levitical race shall teach thee, according to what I have commanded them, and fulfil thou it carefully.— edit Douay text
8: Take heed to thyself in [regard of] the plague of leprosy: thou shalt take great heed to do according to all the law, which the priests the Levites shall report to you; take heed to do, as I have charged you.— edit LXX text