كتاب الزينة من السنن
Read the English translation first, with the original Arabic directly underneath.
It was narrated from 'Amr bin Shu'aib, from his father, from his grandfather, that:
The Messenger of Allah [ﷺ] forbade plucking gray hairs.
أَخْبَرَنَا قُتَيْبَةُ، عَنْ عَبْدِ الْعَزِيزِ، عَنْ عُمَارَةَ بْنِ غَزِيَّةَ، عَنْ عَمْرِو بْنِ شُعَيْبٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم نَهَى عَنْ نَتْفِ الشَّيْبِ .