Nazir

And what is R. Eliezer's reason?  — It has been taught: Why does Scripture mention 'his head'?  — Since it says in connection with the nazirite, There shall no razor come upon his head  it might be thought that this is true even of a nazirite who becomes a leper. We are therefore told that [the leper must shave] his head. How does it follow?  May it not well be that even if he uses tweezers or a rohitni he has carried out his religious duty? And should you object that the razor should not have been mentioned,  [the answer would be that] this tells us that [the leper] may use even a razor; for I might have thought that because a nazirite who uses a razor  incurs a penalty, so does a leper  who uses a razor incur a penalty, and so we are told that this is not so?  — If you assume that a leper who uses tweezers or a rohitni has carried out his religious duty, then because a razor is not mentioned explicitly [in his case, it should be forbidden entirely], in accordance with the dictum of Resh Lakish. What interpretation do the Rabbis put on [the mention of] 'his head'?  — They require it to override the prohibition against rounding [the corners of the head], as it has been taught: [The verse] Ye shall not round the corners of your heads  might mean that the same is true of a leper, and we are therefore told [that he must shave] 'his head'. But this  can be deduced from [the mention of] 'his beard'. For it has been taught: Why does Scripture mentions his beard? Since it says, Neither shall they shave off the corners of their beards,  it might be thought that even [a priest who is] a leper may not do so. And we are therefore told [that the leper must shave] 'his beard'. Now why should it be necessary to mention both 'his head' and 'his beard'?  — It is necessary. For had the All-Merciful mentioned 'his beard' and not 'his head' it might have been thought that the rounding of the whole head is not considered [as infringing the prohibition against] rounding,  and so the All-Merciful Law also mentions 'his head'.