'Hair of His Head' in the Bible

And the people said to Saul, Is death to come to Jonathan, the worker of this great salvation for Israel? Let it not be so: by the living Lord, not one hair of his head is to be touched, for he has been working with God today. So the people kept Jonathan from death.

I went on looking till the seats of kings were placed, and one like a very old man took his seat: his clothing was white as snow, and the hair of his head was like clean wool; his seat was flames of fire and its wheels burning fire.