'Hair' in the Bible

She replied, “Please, may the king invoke the Lord your God, so that the avenger of blood will not increase the loss, and they will not eliminate my son!”“As the Lord lives,” he vowed, “not a hair of your son will fall to the ground.”

When he shaved his head—he shaved it every year because his hair got so heavy for him that he had to shave it off—he would weigh the hair from his head and it would be five pounds according to the royal standard.