הִשָּׁ֧מֶר בְּנֶֽגַע־הַצָּרַ֛עַת לִשְׁמֹ֥ר מְאֹ֖ד וְלַעֲשׂ֑וֹת כְּכֹל֩ אֲשֶׁר־יוֹר֨וּ אֶתְכֶ֜ם הַכֹּהֲנִ֧ים הַלְוִיִּ֛ם כַּאֲשֶׁ֥ר צִוִּיתִ֖ם תִּשְׁמְר֥וּ לַעֲשֽׂוֹת׃ (ס)
在疹斑災病上，你要謹慎，切實遵守，照利未支派的祭司所指教你們的一切去行；我怎樣吩咐了他們，你們就要怎樣謹守遵行。
Rashi
השמר בנגע צרעת TAKE HEED IN THE AFFLICTION OF LEPROSY — take heed that you pluck not out the symptoms of uncleanness (cf. Leviticus ch. XIII.), nor cut out the leprous spot (Makkot 22a).
Ramban
TAKE HEED IN THE PLAGUE OF LEPROSY. This is an explanatory commandment, adding a prohibition against one who cuts out the leprous spot, and also one who avoids showing his plague to the priest. Now, concerning the law of the plagues themselves, he mentioned nothing here, except to state and do according to all that the priests the Levites shall teach you, as I commanded them, because the priests are scrupulous, and whatever He commanded is sufficient for them, as I have already explained.341In the Introduction to this book. Also, above, 1:17.