"The Messenger of Allah ﷺ forbade plucking out white hairs and said: 'It is the light of the believer.'"  

نَهَى رَسُولُ اللَّهِ ﷺ عَنْ نَتْفِ الشَّيْبِ وَقَالَ هُوَ نُورُ الْمُؤْمِنِ