All the days of the vow of his separation there shall no razor come upon his head: until the days be fulfilled, in which he separates himself unto the LORD, he shall be holy, and shall let the locks of the hair of his head grow.
Read Chapter 6
George Leo Haydock
Grow. At the commencement, and at the end of the Nazariteship, the hair was cut; though perhaps a sort of crown was left at the top of the head, as the 7th verse may be rendered, "the crown of his God "(Calmet)
The Nazarite is under the same regulations as the high priest, with respect to any corpse, ver. 6. (Maimonides; More, p. 3.; Leviticus xxi. 11.) Both were consecrated to God in the most perfect manner. (Menochius)
When the hair of Samson was cut off, he immediately lost his supernatural strength, Judges xvi.