كتاب الحج
Read the English translation first, with the original Arabic directly underneath.
Salim reported on the authority of his father ('Abdullah b. 'Umar) that the Messenger of Allah (ﷺ) was asked what a Muhrim should wear, whereupon he said:
A Muhrim should not wear a shirt, or a turban, or a cap, or trousers, or a cloth touched with wars or with saffron, nor (should he wear) stockings, but in case he does not find shoes, but (before wearing stockings) be should trim them (in such a way) that these should become lower than the ankles.
لاَ يَلْبَسُ الْمُحْرِمُ الْقَمِيصَ وَلاَ الْعِمَامَةَ وَلاَ الْبُرْنُسَ وَلاَ السَّرَاوِيلَ وَلاَ ثَوْبًا مَسَّهُ وَرْسٌ وَلاَ زَعْفَرَانٌ وَلاَ الْخُفَّيْنِ إِلاَّ أَنْ لاَ يَجِدَ نَعْلَيْنِ فَلْيَقْطَعْهُمَا حَتَّى يَكُونَا أَسْفَلَ مِنَ الْكَعْبَيْنِ