King James Version
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.New International Version
"'During the entire period of his vow of separation no razor may be used on his head. He must be holy until the period of his separation to the LORD is over; he must let the hair of his head grow long.Catholic Public Domain Version
During all the time of his separation, no razor shall pass over his head, even until the completion of the day when he is consecrated to the Lord. He shall be holy, letting the hair of his head grow long