Numbers 6:6-9

King James Version

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

⁷ He 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.

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

⁹ And 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.