Sahih Muslim #6084 · The Book of Virtues

Sahih MuslimJabir b. Samura reported that there had appeared some whiteness on the front part of the head and beard of Allah's Messenger
Sahih Muslim · Book 43 · The Book of Virtues
Sahih Muslim · كتاب 43 · كتاب الفضائل
His face was as (bright) as the sword. Thereupon he (Jabir) said: No, it was round and like the sun and the moon. And I saw the seal near his shoulder of the size of a pigeon's egg and its color was the same as that of his body.
وَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عُبَيْدُ اللَّهِ، عَنْ إِسْرَائِيلَ، عَنْ سِمَاكٍ، أَنَّهُ سَمِعَ جَابِرَ بْنَ سَمُرَةَ، يَقُولُ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم قَدْ شَمِطَ مُقَدَّمُ رَأْسِهِ وَلِحْيَتِهِ وَكَانَ إِذَا ادَّهَنَ لَمْ يَتَبَيَّنْ وَإِذَا شَعِثَ رَأْسُهُ تَبَيَّنَ وَكَانَ كَثِيرَ شَعْرِ اللِّحْيَةِ فَقَالَ رَجُلٌ وَجْهُهُ مِثْلُ السَّيْفِ قَالَ لاَ بَلْ كَانَ مِثْلَ الشَّمْسِ وَالْقَمَرِ وَكَانَ مُسْتَدِيرًا وَرَأَيْتُ الْخَاتَمَ عِنْدَ كَتِفِهِ مِثْلَ بَيْضَةِ الْحَمَامَةِ يُشْبِهُ جَسَدَهُ ‏.‏
Reference : Sahih Muslim 6084In-book reference : Book 43, Hadith 142