Бамидбар 19:12 Ссылки в Мишне: Mishnah Nazir & Mishnah Mikvaot

If one says, “Behold, I am a nazirite,” and becomes impure on the thirtieth day, he renders void the whole period. Rabbi Eliezer says: only seven days are void. [If one says,] “Behold, I am a nazirite for thirty days”, and becomes impure on the thirtieth day, then he renders void the whole period.

If one takes a nazirite vow while in a graveyard, then even if he remains there for thirty days, these do not count, and he does not have to bring the sacrifice [prescribed] for impurity. If he leaves it and re-enters, [the period] counts, and he must bring the sacrifice [prescribed] for impurity. Rabbi Eliezer says: not [if he re-enters] on the same day, for it says, “But the former days shall be void,” (Numbers 6:12) until there are former days.

For which types of defilement must the nazirite shave?For [defilement contracted from] a corpse, or an olive’s bulk of [the flesh of] a corpse, or an olive’s bulk of corpse ooze, or a ladleful of corpse-mould; Or the spinal column, or the skull, or any limb [severed] from a corpse, or any limb [severed] from a living body that is still properly covered with flesh, or a half-kav of bones, or a half-log of blood. Whether [the defilement was contracted] from contact with them, from carrying them, or from overshadowing them. For [defilement contracted from] a barley-grain’s bulk of bone, whether by contact or carrying. On account of these, a nazirite must shave and be sprinkled on the third and seventh days, and such [defilement] annuls the previously served period, and he does not begin to count a new [naziriteship] until he has become clean and brought his sacrifices.