Sahih al-Bukhari 1540
Sahih al-Bukhari · Book 25: Hajj (Pilgrimage) · Talbiya and Ihram with head-hair matted (with resin or the like)
Narrated Salim from his father:
حَدَّثَنَا أَصْبَغُ ، أَخْبَرَنَا ابْنُ وَهْبٍ ، عَنْ يُونُسَ ، عَنِ ابْنِ شِهَابٍ ، عَنْ سَالِمٍ ، عَنْ أَبِيهِ ـ رضى الله عنه ـ قَالَ سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يُهِلُّ مُلَبِّدًا.
I heard that Allah's Messenger (ﷺ) assumed Ihram with his hair matted together.