Numbers 6:2-4

2“Say to the sons of Israel, ‘When a man or a woman makes a special vow, the vow of a Nazirite, that is, one separated and dedicated to the Lord,

3he shall abstain from wine and strong drink; he shall drink no vinegar, whether made from wine or strong drink, nor shall he drink any grape juice nor eat fresh or dried grapes.

4All the time of his separation he shall not eat anything produced from the grapevine, from the seeds even to the skins.