Numbers 6:5 (KJV)
All the days of the vow of his separation there shall no razor come upon his head until the days be fulfilled in the which he separateth himself unto the LORD he shall be holy and shall let the locks of the hair of his head grow
All the days of the vow of his separation there shall no razor come upon his head until the days be fulfilled in the which he separateth himself unto the LORD he shall be holy and shall let the locks of the hair of his head grow