Nazir 7:1-2

Nazir 7:1

Neither the Kohein Gadol (High Priest) nor a nazir may render themselves ritually unclean for a relative but they may do so for a meis mitzvah (a corpse with no one to bury it). If the two of them were traveling together and they found a body, Rabbi Eliezer says the Kohein Gadol should allow himself to be rendered unclean but not the nazir; the Sages say the nazir should allow himself to be rendered unclean but not the Kohein Gadol. Rabbi Eliezer said to the Sages, the Kohein Gadol should be the one to become unclean because he doesn’t bring a sacrifice if rendered unclean and the nazir does (suggesting that the nazir has a higher state of sanctity). The Sages replied that the nazir should be the one to become unclean because his state of sanctity is temporary but the Kohein Gadol’s is permanent.

Nazir 7:2

A nazir shaves for the following types of ritual impurity: a corpse; an olive-sized piece of a corpse; an olive-sized piece of congealed flesh; a ladle full of decayed dust from a corpse; the spinal column, skull or a limb from a corpse; a limb from a living person that has sufficient flesh on it; half a kav of bones (about 21 oz.); half a log of blood (about 7 oz.). This applies to touching these things, carrying them, and being under the same roof as them. When it comes to a piece of bone the size of a barleycorn, a nazir shaves for touching or carrying it. In all of these cases, the nazir shaves, sprinkles for corpse impurity on the third and seventh days, and loses all the days of nezirus he has already completed. He does not start counting again until he is purified and brings his sacrifices.