Numbers 6:3-5

Amplified Bible, Classic Edition

³ He shall separate himself from wine and strong drink; he shall drink no vinegar of wine or of strong drink, and shall drink no grape juice, or eat grapes, fresh or dried.^(A)

⁴ All the days of his separation he shall eat nothing produced from the grapevine, not even the seeds or the skins.

⁵ All the days of the vow of his separation and abstinence there shall no razor come upon his head. Until the time is completed for which he separates himself to the Lord, he shall be holy, and shall let the locks of the hair of his head grow long.