Sahih al-Bukhari, Volume 1, Book 8, Hadith 362 (USC-MSA) ⓘ
Narrated Ibn `Umar: A person asked Allah's Messenger, "What should a Muhrim wear?" He replied, "He should not wear shirts, trousers, a burnus (a hooded cloak), or clothes which are stained with saffron or Wars (a kind of perfume). Whoever does not find a sandal to wear can wear Khuffs (socks made from thick fabric or leather), but these should be cut short so as not to cover the ankles.
حَدَّثَنَا عَاصِمُ بْنُ عَلِيٍّ، قَالَ حَدَّثَنَا ابْنُ أَبِي ذِئْبٍ، عَنِ الزُّهْرِيِّ، عَنْ سَالِمٍ، عَنِ ابْنِ عُمَرَ، قَالَ سَأَلَ رَجُلٌ رَسُولَ اللَّهِ صلى الله عليه وسلم فَقَالَ مَا يَلْبَسُ الْمُحْرِمُ فَقَالَ " لاَ يَلْبَسُ الْقَمِيصَ وَلاَ السَّرَاوِيلَ وَلاَ الْبُرْنُسَ وَلاَ ثَوْبًا مَسَّهُ الزَّعْفَرَانُ وَلاَ وَرْسٌ، فَمَنْ لَمْ يَجِدِ النَّعْلَيْنِ فَلْيَلْبَسِ الْخُفَّيْنِ وَلْيَقْطَعْهُمَا حَتَّى يَكُونَا أَسْفَلَ مِنَ الْكَعْبَيْنِ " . وَعَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ عَنِ النَّبِيِّ صلى الله عليه وسلم مِثْلَهُ.
also referenced under: Book 8, Hadith 18 (In-Book) & Hadith 366 (DarusSalam)