ENOfficial
It was narrated that Abu Juhaifah said: “I saw the Messenger of Allah (ﷺ), and this part of his hair was white” – meaning the tuft of hair between the lower lip and the chin.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا أَبُو دَاوُدَ، حَدَّثَنَا زُهَيْرٌ، عَنْ أَبِي إِسْحَاقَ، عَنْ أَبِي جُحَيْفَةَ، قَالَ رَأَيْتُ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ هَذِهِ مِنْهُ بَيْضَاءُ . يَعْنِي عَنْفَقَتَهُ .
sunnah.com