2,938. Which Doubtfully Impure Doubtful Metzora Nazirs Shave?

Hilchos Nezirus 10:8

The guilt offering and burnt offering are not indispensable for a nazir shaving in impurity or for a metzora. Therefore, if he was definitely a metzora but not unclean with corpse impurity, he was rendered clean when he brought the birds. The bird for a sin offering was his sin offering, but it’s not eaten because it was brought out of doubt. The animal brought with it for a burnt offering is considered part of his obligation when shaving in purity so that the shaving will be in combination with an offering. If he was ritually unclean with corpse impurity, then the animal is a freewill offering. If he didn’t have tzaraas but was unclean with corpse impurity, the bird for a sin offering is the offering of a nazir who was rendered unclean and the animal is a freewill offering. In the end, he brings his purity offerings. If the nazir was neither ritually unclean nor a metzora, the animal brought with the first shaving is for the obligation of shaving in purity. The bird for a sin offering is brought out of doubt, so it’s not eaten.

Hilchos Nezirus 10:9

All of the above halachos about a nazir shaving four times apply to a nazir who is a minor or a woman; a grown man doesn’t shave in a case of doubt. This is true both of shaving in impurity and of shaving for tzaraas because the possibility exists that he was ritually clean and he will be cutting off his peyos not for purposes of a mitzvah. In such a case, a grown man only shaves in purity. These four shavings aren’t indispensable, they’re just the optimum way to perform the mitzvah.