Talmud - Nazir 49b נזיר מ״ט ב׳

“In to any” serves to exclude contracting impurity to bury distant people, for whom a High Priest may not become impure; “dead” comes to exclude relatives; “bodies” comes to exclude a quarter-log of blood that emerges from two corpses, for it renders people and objects impure in a tent, as it is stated: “Neither shall he go in to any dead bodies” (Leviticus 21:11). The plural “bodies” teaches that the blood of two people combines to form the minimum quantity for ritual impurity.

MISHNA: A nazirite shaves for having become impure from these following sources of ritual impurity: For having become impure with impurity imparted by a corpse; and for impurity imparted by an olive-bulk of a corpse; and for impurity imparted by an olive-bulk of fluid [netzel] from a corpse; and for impurity imparted by a full ladle [tarvad] of dust from a corpse; and for impurity imparted by the spine; and for impurity imparted by the skull; and for impurity imparted by a limb from a corpse or for impurity imparted by a limb severed from a living person, upon either of which there is a fitting quantity of flesh; and for impurity imparted by a half-kav of bones from a corpse; and for impurity imparted by a half-log of blood.

And a nazirite shaves in each of these cases for becoming impure by coming into contact with them; and for becoming impure by carrying them; and for becoming impure by their tent, i.e., if he was positioned like a tent over them, or if he entered a tent that contains them, or if they served as a tent over him. And as for a bone that is a barley-grain-bulk, he shaves for becoming impure by coming into contact with it and by carrying it. However, he is not rendered impure with the impurity imparted in a tent, i.e., by being under the same roof as the bone.

For all of these occurrences, a nazirite shaves, and a priest sprinkles the ashes of the red heifer on him on the third and on the seventh days to purify him from the impurity imparted by a corpse. And he negates all the previous days he counted toward his naziriteship, and he begins counting his term of naziriteship again only after he becomes pure and brings his offerings.

GEMARA: The Sages taught: After Rabbi Meir’s death, Rabbi Yehuda said to his students: Do not let the students of Rabbi Meir enter here, into the house of study, because they are vexatious and they do not come to study Torah, but they come to overwhelm me with their halakhot. Nevertheless, Sumakhos, a student of Rabbi Meir, forced his way and entered the house of study.

When they reached the topic of the mishna, Sumakhos said to them: Rabbi Meir taught me like this: A nazirite shaves for becoming impure from these following sources of ritual impurity: For impurity imparted by a corpse and for impurity imparted by an olive-bulk from a corpse. Rabbi Yehuda grew angry and said to his disciples: Didn’t I say to you like this: Do not let the students of Rabbi Meir enter here because they are vexatious? He explained his annoyance. The clause: For a corpse, is unnecessary, as, if a nazirite must shave for impurity imparted by an olive-bulk from a corpse, is it not all the more so that he must shave for impurity imparted by an entire corpse?

Traduction : The William Davidson digital edition of the Koren Noé Talmud, with commentary by Rabbi Adin Even-Israel Steinsaltz.

Nazir 49b explores how a High Priest avoids corpse impurity through relatives and blood quantities, then details the corpse-related sources requiring a nazirite to shave.