Numbers 6:2-4

2“Speak to the Israelites and tell them that if a man or woman makes a special vow, the vow of a Nazirite,1 to separate himself to the LORD, 3he is to abstain from wine and strong drink. He must not drink vinegar made from wine or strong drink, and he must not drink any grape juice or eat fresh grapes or raisins. 4All the days of his separation, he is not to eat anything that comes from the grapevine, not even the seeds or skins.