Ash-Shama'il Al-Muhammadiyah, Book 5, Hadith 43 (English)

Jaabir bin Samurah R.A. was asked: "Were there any white hair in the blessed head of Rasulullah (Sallallahu alaihe wasallam)? He replied: 'He only had a few on the middle parting, and when Rasuullah (Sallallahu alaihe wasallam) oiled his hair, they did not show'".

حَدَّثَنَا أَحْمَدُ بْنُ مَنِيعٍ، قَالَ‏:‏ حَدَّثَنَا سُرَيْجُ بْنُ النُّعْمَانِ، قَالَ‏:‏ حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ، عَنْ سِمَاكِ بْنِ حَرْبٍ، قَالَ‏:‏ قِيلَ لِجَابِرِ بْنِ سَمُرَةَ‏:‏ أَكَانَ فِي رَأْسِ رَسُولِ اللهِ صلى الله عليه وسلم شَيْبٌ‏؟‏ قَالَ‏:‏ لَمْ يَكُنْ فِي رَأْسِ رَسُولِ اللهِ صلى الله عليه وسلم، شَيْبٌ إِلا شَعَرَاتٌ فِي مَفْرِقِ رَأْسِهِ، إِذَا ادَّهَنَ وَارَاهُنَّ الدُّهْنُ‏.‏

also referenced under: Book 5, Hadith 44 (In-Book)