Numbers 6:5-9

5“As long as they are under the Nazirite vow, no razor may touch their heads. During the entire time that they are dedicated to the Lord as Nazirites, they will be holy. They must let their hair grow long.

6While they are dedicated to the Lord as Nazirites, they must never go near a dead body.

7Even if their own father, mother, brother, or sister dies, they must not make themselves unclean  by going near them. Nazarites show their vow to God with their long hair.

8As long as they are Nazirites, they will be holy to the Lord.

9“Someone might suddenly drop dead next to a Nazirite and make the Nazirite’s hair unclean. Seven days later he must shave his head in order to be declared clean.