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 ﷺ نَهَى عَنْ نَتْفِ الشَّيْبِ .