Rami bar Chama’s Inquiry
Rami bar Chama inquired (Daf Yomi: Nazir 61a): Is the reason that these four shavings are done because of the mitzvah of shaving, or is the purpose merely to remove the hair? The difference between these two reasons is whether or not they can be done with a depilatory. If they have the same laws as shaving when it is a mitzvah, it must be done with a razor. If it is just a matter of removing the hair, it can be done with a cream. What is the law?
Rami bar Chama’s question cannot be with respect to all the shavings, for a metzora and a nazir tahor are definitely required to shave with a razor. His inquiry can only be relevant to a nazir tamei.
Furthermore, Tosfos explains, he cannot be discussing the precise case of the braisa, for there, all four shavings must be done with a razor, since we are uncertain which of the four shavings is for the nazir tamei. He must be referring to a case where it was definitely known that the nazir was tamei. In truth, Rami bar Chama could have inquired simply: Does the shaving of a nazir tamei require a razor or not!
The Gemora brings a proof from the braisa which explicitly states that four shavings are required. Tosfos explains: Since in the braisa’s case, he would not be permitted to drink wine until after the fourth shaving; if a razor would not be necessary for the shaving of a nazir tamei, we would not have required a razor for the third shaving out of the concern that he might be concluding his nezirus with this shaving.
Depilatory
The Rambam rules that a nazir who shaves will receive lashes, whether he used a razor, and even if a different type of implement was used. However, if he used a depilatory, he will not incur lashes; rather, he will have negated the nazir’s positive commandment of growing his hair.
The Brisker Rav notes that it is evident from the Rambam that using a depilatory does not constitute a shaving at all! Accordingly, Rami bar Chama’s inquiry regarding a nazir tamei is not merely if a razor is required for his shaving; rather, his inquiry is if a nazir tamei has an obligation to shave! Perhaps, it is not necessary for him to shave at all; as long as his hair is removed, that is sufficient.
Based on this understanding, we can understand Rava’s proof from the braisa which states that a nazir, who might be tamei, is obligated to “shave” four times. The Gemora had stated earlier that he must shave four times, and not less, because one shaving cannot count for the other. This would only be understandable if a nazir tamei has an obligation to shave. However, if the halacha merely is that the hair of a nazir tamei must be removed, and this can even be done by means of a depilatory, which does not constitute a shaving at all, it would not be necessary to require a special shaving for the nazir tamei. When he shaves his hair for the tzaraas, it should automatically be valid for his “removal of hair,” needed for a nazir tamei. By the fact that the braisa rules that four shavings are required and not one of them can count for the other, this proves that a nazir tamei also has a mitzvah of shaving, and therefore, a depilatory may not be used.
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