Someone who declared himself a nazir while in a cemetery —- even if he was there for thirty days, they are not reckoned for him in the count [of his term], and he does not bring the sacrifice for tumah. [If] he left and re-entered, they are reckoned for him in the count, and he does bring the sacrifice for tumah. R’ Eliezer says: Not on that same day, as it says: But the first days shall be forfeit (Numbers 6:12) —- until there are first days.