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tirmidhi:2821Hārūn b. Isḥāq al-Hamdānī > ʿAbdah > Muḥammad b. Isḥāq > ʿAmr b. Shuʿayb from his father from his grandfather

from his father, from his grandfather: "The Prophet ﷺ prohibited plucking gray hair. And he said: "It is the Muslim's light.'"  

الترمذي:٢٨٢١حَدَّثَنَا هَارُونُ بْنُ إِسْحَاقَ الْهَمْدَانِيُّ حَدَّثَنَا عَبْدَةُ عَنْ مُحَمَّدِ بْنِ إِسْحَاقَ عَنْ عَمْرِو بْنِ شُعَيْبٍ عَنْ أَبِيهِ عَنْ جَدِّهِ

أَنَّ النَّبِيَّ ﷺ نَهَى عَنْ نَتْفِ الشَّيْبِ وَقَالَ إِنَّهُ نُورُ الْمُسْلِمِ قَالَ هَذَا حَدِيثٌ حَسَنٌ قَدْ رُوِيَ عَنْ عَبْدِ الرَّحْمَنِ بْنِ الْحَارِثِ وَغَيْرِ وَاحِدٍ عَنْ عَمْرِو بْنِ شُعَيْبٍ