The third wonder (was): From the day when the heavens and the earth were created there never was a man upon whom grey hairs were sprinkled until Abraham came. The people were astonished because they had not seen any one like him from the day when the world was created. Whence do we know that grey hairs were sprinkled upon him? Because it is said, "And Abraham was old, well stricken in age" (Gen. 24:1).
Rabbi Levitas, a man of Jamnia, said: Like a diadem which belongs to the head of the king, so are grey hairs beauty and glory to old men, as it is said, "The glory of young men is their strength, and the beauty of old men is the hoary head" (Prov. 20:29).