Nazir

But it [also] says, A razor shall not come upon his head?  — This is to provide for a penalty on two counts. R. Hisda said that stripes are incurred by [removing] one hair; [the completion of his naziriteship] is held up if two hairs [remain];  [the naziriteship] does not become void unless the greater part of his hair is removed by a razor. [Are we to understand that] a razor only [is meant by R. Hisda] but no other method? Is it not taught 'How do we know that all other methods of removing [the hair are equally forbidden] etc.'? — You must therefore say [in R. Hisda's dictum] 'removed as though by a razor.' Likewise has it been taught: A nazirite who pulls out [his hair], or plucks it, or trims it but a little [incurs a penalty, but he]  does not render void [the previous period] unless [he shaves] the greater part of his head with a razor.  R. Simeon b. Judah in the name of R. Simeon said: Just as two hairs [if they are left] hold up [the termination of the naziriteship], so also [the removal of] two hairs renders void [the previous period]. We learn elsewhere: There are three who must poll, and whose polling is a religious duty, the nazirite, the leper, and the levites.  If any one of them polled without a razor, or left behind two hairs, his act is invalid. The Master said, 'There are three who must poll and whose polling is a religious duty.' Surely this is obvious?  It might have been thought that they are simply required to remove their hair, and even smearing it with nasha  [is valid] and so we are told that this is not so. It is [also] stated, 'If any one of them polled without a razor etc. Now we can grant this in the case of a nazirite where there is written, There shall no razor come upon his head,  and of the levites where there is written, And let them cause a razor to pass over all their flesh,  but how do we know that a leper must use a razor? Should you reply that this can be inferred from the levites [by the following argument, viz.] The levities require to poll, and the polling must be performed with a razor, and so I will infer of the leper who is required to poll that the polling must be performed with a razor; [your argument] can be refuted. For although it is true of the levites [that they must use a razor, this may be] because they had to be offered as a wave-offering,  which is not the case with the leper. You will therefore attempt to infer it from the nazirite.  But [it may be asked] although it is true of the nazirite, [this may be] because his sacrifice must be accompanied by cakes,  whereas a leper's does not require this. It being thus impossible to infer what is required from one by itself, you will try to infer it from both together in the following way. You will infer it [using the above argument] from the levites. [To the objection] that although it is true of the levites [this may be] because they had to be offered as a wave-offering, [you will reply that] the nazirite will show [that this cannot be the reason].  [To the objection that] although it is true of the nazirite [this may be] because his sacrifice must be accompanied by cakes, [you will reply that] the levites show [that this cannot be the reason].  The argument thus goes round; what applies to one side does not apply to the other; and what applies to the other side does not apply to the one side. What they have in common is that they both require to poll  and this polling must be done with a razor, and so I will infer with regard to the leper  who is also required to poll that his polling must be done with a razor. Said Raba of Barnesh  to R. Ashi: But can it not be objected that another common property of [the levites and the nazirite] is