Numbers 6:3-5

Revised Standard Version Catholic Edition

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. ⁴ All the days of his separation^[a] he shall eat nothing that is produced by the grapevine, not even the seeds or the skins.

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