Numbers 6:5-11

5All the days of the vow of his separation there shall no razor come upon his head: until the days be fulfilled, in the which he separateth himself unto Yhwh, he shall be holy, and shall let the locks of the hair of his head grow.

6All the days that he separateth himself unto Yhwh he shall come at no dead body.

7He shall not make himself unclean for his father, or for his mother, for his brother, or for his sister, when they die: because the consecration of his God is upon his head.1

8All the days of his separation he is holy unto Yhwh.

9And if any man die very suddenly by him, and he hath defiled the head of his consecration; then he shall shave his head in the day of his cleansing, on the seventh day shall he shave it.

10And on the eighth day he shall bring two turtledoves, or two young pigeons, to the priest, to the door of the tabernacle of the congregation:

11And the priest shall offer the one for a sin offering, and the other for a burnt offering, and make an atonement for him, for that he sinned by the dead, and shall hallow his head that same day.