'Hair of His Head' in the Bible

All the days of his vow to separate, no razor shall come upon his head. Until all the days are fulfilled in which he separates to Jehovah, he shall be holy. He shall let the locks of the hair of his head grow.

However the hair of his head began to grow again after he had been shaven.

And the people said to Saul, Shall Jonathan die, who has worked out this great salvation in Israel? Far be it! As Jehovah lives, not one hair of his head shall fall to the ground, for he has worked with God this day. So the people rescued Jonathan, so that he did not die.

And when he sheared his head (for it was at every year's end that he sheared it, because it was heavy on him. And he sheared it), and he weighed the hair of his head at two hundred shekels, according to the king's weight.

And Solomon said, If he becomes a son of virtue, not a hair of his head shall fall to the earth. But if wickedness shall be found in him, then he shall die.

I watched until the thrones were set in place, and the Ancient of Days sat, whose robe was white as snow, and the hair of His head like the pure wool. His throne was like flames of fire, and His wheels like burning fire.