Numbers 6:3; Numbers 6:20

3 he shall separate himself from wine and strong drink. He shall drink no vinegar made from wine or strong drink and shall not drink any juice of grapes or eat grapes, fresh or dried.

20 and the priest shall wave them for a wave offering before the LORD. They are a holy portion for the priest, together with the breast that is waved and the thigh that is contributed. And after that the Nazirite may drink wine.