הִשָּׁ֧מֶר בְּנֶֽגַע־הַצָּרַ֛עַת לִשְׁמֹ֥ר מְאֹ֖ד וְלַעֲשׂ֑וֹת כְּכֹל֩ אֲשֶׁר־יוֹר֨וּ אֶתְכֶ֜ם הַכֹּהֲנִ֧ים הַלְוִיִּ֛ם כַּאֲשֶׁ֥ר צִוִּיתִ֖ם תִּשְׁמְר֥וּ לַעֲשֽׂוֹת׃ (ס)
<span class="x" onmousemove="Show('perush','Este es el <b>308vo Precepto Negativo</b> enumerado por el Rambam en el Prefacio a Mishné Torá, su “Compendio de la Ley Hebrea” para todo el Pueblo de Israel.',event);" onmouseout="Close();">Guárdate de llaga de lepra</span>, observando diligentemente, y haciendo según todo lo que os enseñaren los sacerdotes Levitas: cuidaréis de hacer como les he mandado.
Kuzari
58. The Rabbi: The community whose guardian and compensator is always in its midst--I mean God. Joshua said: 'You cannot serve the Lord, for He is an holy God' (Joshua 24:19). Notwithstanding this, his community was so zealously observing that, in the matter of the trespass of 'the devoted thing of Jericho,' not more than the one, Achan, was found disobedient among more than six hundred thousand. The punishment followed immediately, just as it did in the case of Miriam, who was afflicted with leprosy; also in the cases of Uzzah, Nadab and Abihu, and the people of Beth-Shemesh, who were punished because they had 'looked into the ark of the Lord' (I Samuel 6:19). It was one of the wonderful traits of God that His displeasure for minor transgressions was shown on the walls of houses and in the clothes, whilst for more grievous sins the bodies were more or less severely stricken. The priests were appointed to study this profound science and to discover to what extent these trials were God's punishment (this often took them weeks to find out, as was the case with Miriam), or how much was simply constitutionally curable or incurable. This is an abstruse science to which God pointed in the words: 'Take heed in the plague of leprosy, that thou observe diligently and do according to all that the priests, the Levites, shall teach you' (Deuteronomy 24:8).
Kuzari
59. Al Khazari: Hast thou a satisfactory argument on the matter?