Numbers 6:5-7

Amplified Bible, Classic Edition

⁵ All the days of the vow of his separation and abstinence there shall no razor come upon his head. Until the time is completed for which he separates himself to the Lord, he shall be holy, and shall let the locks of the hair of his head grow long.

⁶ All the days that he separates himself to the Lord he shall not go near a dead body.

⁷ He shall not make himself unclean for his father, mother, brother, or sister, when they die, because his separation and abstinence to his God is upon his head.