Abu Dawood: 4/419 ; Ahmad , Nasai , Abu Dawood: 4212 ; Jame: 6153. Many mature people are seen doing this. They dye their hair white with black and pretend to be young or relatively young. There is nothing but deception , concealment of God's creation ("there is no change in God's creation" [Surah *** ; verse: 30:30]) and false self-satisfaction. This, of course, has a detrimental effect on personal behavior. And other people are deceived by it. The Prophet (peace and blessings of Allaah be upon him) said to apply khejab on mature hair with mehendi or something like that , so that the basic colors like yellow , red, etc., come out. However, the Prophet (peace and blessings of Allaah be upon him) never allowed black color to irritate.