Num 6:1-7

The Nazirites 1The Lord spoke to Moses, saying:2Speak to the Israelites and say to them: When either men or women make a special vow, the vow of a nazirite, to separate themselves to the Lord,3they shall separate themselves from wine and strong drink; they shall drink no wine vinegar or other vinegar, and shall not drink any grape juice or eat grapes, fresh or dried.4All their days as nazirites they shall eat nothing that is produced by the grapevine, not even the seeds or the skins.5All the days of their nazirite vow no razor shall come upon the head; until the time is completed for which they separate themselves to the Lord, they shall be holy; they shall let the locks of the head grow long.6All the days that they separate themselves to the Lord they shall not go near a corpse.7Even if their father or mother, brother or sister, should die, they may not defile themselves; because their consecration to God is upon the head.