Numbers 6:3-8

3they must abstain from wine and other fermented drink and must not drink vinegar made from wine or other fermented drink. They must not drink grape juice or eat grapes or raisins. 4As long as they remain under their Nazirite vow, they must not eat anything that comes from the grapevine, not even the seeds or skins. 5“ ‘During the entire period of their Nazirite vow, no razor may be used on their head. They must be holy until the period of their dedication to the Lord is over; they must let their hair grow long. 6“ ‘Throughout the period of their dedication to the Lord, the Nazirite must not go near a dead body. 7Even if their own father or mother or brother or sister dies, they must not make themselves ceremonially unclean on account of them, because the symbol of their dedication to God is on their head. 8Throughout the period of their dedication, they are consecrated to the Lord.