حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبْدَةُ بْنُ سُلَيْمَانَ، عَنْ مُحَمَّدِ بْنِ إِسْحَاقَ، عَنْ عَمْرِو بْنِ شُعَيْبٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، قَالَ نَهَى رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ عَنْ نَتْفِ الشَّيْبِ وَقَالَ ‏"‏ هُوَ نُورُ الْمُؤْمِنِ ‏"‏ ‏.‏

It was narrated from 'Amr bin Sh'uaib from his father, that his grandfather said: "The Messenger of Allah(PBUH) forbade plucking out white hairs and said: 'It is the light of the believer.'" Translation Not Available

Book Ref: Sunan Ibn Majah Book 33 Hadith 3721
Web Ref:  Sunan Ibn Majah Vol 5 Book 33 Hadith 3721