Numbers 6:3-8

3he 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. 4All the days of his separation 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 touch 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. 6“All the days that he separates himself to the LORD he shall not go near a dead body. 7Not even for his father or for his mother, for brother or sister, if they die, shall he make himself unclean, because his separation to God is on his head. 8All the days of his separation he is holy to the LORD.