Numbers 6:1-3

Again the Lord spoke to Moses, saying,

“Speak to the sons of Israel and say to them, ‘When a man or woman makes a special vow, namely, the vow of a Nazirite, to live as a Nazirite for the Lord,

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