The hoary head is a crown of beauty and glory if it is found in the way of righteousness (moral and spiritual rectitude in every area and relation).
The glory of young men is their strength, and the beauty of old men is their gray head [suggesting wisdom and experience].
His head and His hair were white like white wool, [as white] as snow, and His eyes [flashed] like a flame of fire.
Also when [the old] are afraid of danger from that which is high, and fears are in the way, and the almond tree [their white hair] blooms, and the grasshopper [a little thing] is a burden, and desire and appetite fail, because man goes to his everlasting home and the mourners go about the streets or marketplaces.
And do not swear by your head, for you are not able to make a single hair white or black.
The priest shall look at the diseased spot on his skin, and if the hair in it has turned white and the disease appears depressed and deeper than his skin, it is a leprous disease; and the priest shall examine him, and pronounce him unclean.
If the bright spot is white on his skin, not depressed, and the hair on it not turned white, the priest shall quarantine the person or bind up the spot for seven days.
And the priest shall examine him, and if there is a white swelling in the skin and the hair on it has turned white and there is quick raw flesh in the swelling,
And if when the priest examines it it looks lower than the skin and the hair on it is turned white, the priest shall pronounce him unclean; it is the disease of leprosy; it has broken out in the boil.
But if the priest examines it and finds no white hair in it and it is not lower than the skin but appears darker, then the priest shall bind it up for seven days.
Then the priest shall examine it, and if the hair in the bright spot is turned white, and it appears deeper than the skin, it is leprosy broken out in the burn. Therefore the priest shall pronounce him unclean; it is the disease of leprosy.
But if the priest examines it and there is no white hair in the bright spot and it is not lower than the rest of the skin but is darker, then the priest shall bind it up for seven days.
And when the cloud departed from over the Tent, behold, Miriam was leprous, as white as snow. And Aaron looked at Miriam, and, behold, she was leprous!
2 Kings 5:27
Therefore the leprosy of Naaman shall cleave to you and to your offspring forever. And Gehazi went from his presence a leper as white as snow.
Damascus traded with you because of the abundance of supplies of your handiworks and the immense wealth of every kind, with wine of Helbon [Aleppo] and white wool [of Sachar in Syria].
Come now, and let us reason together, says the Lord. Though your sins are like scarlet, they shall be as white as snow; though they are red like crimson, they shall be like wool.