Nazir 44B

מתני׳ תגלחת טומאה כיצד? היה מזה בשלישי ובשביעי ומגלח בשביעי, ומביא קרבנותיו בשמיני. ואם גילח בשמיני ⁠— מביא קרבנותיו בו ביום, דברי רבי עקיבא. אמר לו רבי טרפון: מה בין זה למצורע?

Mishnah: With regard to the shaving of ritual impurity performed by a nazirite who became impure during his naziriteship, how is it performed? The priest would sprinkle the waters of purification on him on the third and the 7th days after he contracted his impurity, as performed for all those who contracted impurity imparted by a corpse. And he shaves his hair on the 7th day and brings his offerings on the 8th day. And if he shaved on the 8th day he brings his offerings on that day, this is the statement of R' Akiva. R' Tarfon said to him: What is the difference between this ritual and that of a metzora? A metzora also shaves on the 7th day and sacrifices his offerings on the 8th. However, if a metzora shaves on the 8th day he brings his offerings on the 9th day, not on the day of his shaving.

אמר לו: זה טהרתו תלויה בימיו, ומצורע טהרתו תלויה בתגלחתו. ואינו מביא קרבן אלא אם כן היה מעורב שמש.

R' Akiva said to him: The purification of this impure nazirite depends on his days, as he immerses on the 7th day like all those who contract impurity imparted by a corpse, which means he is already ritually pure on the 8th day. But with regard to a metzora, his purification depends on his shaving. Any immersion performed earlier is of no account, and must be repeated. And a metzora brings his offering only if the sun has set following his immersion. Since offerings are not sacrificed at night, the bringing of his offering is postponed until the following day.