The first shaving should be performed after the conclusion of the first year.He shaves his head, his beard, and his eyebrows and undergoes the purification process involving a cedar tree, a hyssop, and two wild birds like other metzoraim. If he was not impure due to contact with a corpse, nor a metzora, this is the shaving performed upon completion of his nazirite vow in purity. If he was indeed a metzora during the first year, this is the first shaving required of the metzora.
He then waits another year as is the span of his nazirite vow, and then performs the second shaving required of metzora. He may not shave after seven days like other metzoraim, for perhaps he was not a metzora, but instead had been impure because of contact with a corpse. [In that instance,] during this second year, he was a nazirite, who was forbidden to shave. [Nevertheless,] after he performed these two shavings, he has completed the purification process required after tzara'at and he is permitted to partake of consecrated foods.
He then waits another year and afterwards, performs a third shaving, lest he had been definitely a metzora during the first year and not impure because of contact with a corpse. [The observance] of the first year was not of consequence for him because these were days when his status [as a metzora] was defined. [The observance] of the second year was not of consequence for him because these were the days when he was counting [as part of the purification process of a] metzora between the first shaving and the second shaving. Therefore he must wait a third year, [observing his] nazirite vow. [Afterwards,] he performs a third shaving for his nazirite vow. This shaving [is required to emerge from] purity. [Nevertheless,] perhaps he was definitely impure because of contact with a corpse and he was also definitely a metzora and one shaving cannot serve the purpose of his nazirite vow and [purification from] tzara'at. Thus the first and second shavings were [for purification] from tzara'at. The third shaving was [for the sake of purification from] ritual impurity. None of these three years count because the third shaving was to purify him from ritual impurity. Therefore he must wait a fourth year, [observing] his nazirite vow and perform a fourth shaving. After each of the times that he shaves because of the doubt, it is forbidden to benefit from his hair because of the doubt involved, because it is permitted to benefit from the hair of a nazirite who became afflicted with tzara'at.