Muwatta Imam Malik Book of Hajj, Hadith 9
Yahya related to me from Malik from 'Abdullah ibn Dinar that Abdullah ibn Umar said, "The Messenger of Allah ﷺ forbade anyone in ihram to wear a garment which had been dyed with saffron or yellow dye, and said, 'Anyone that cannot find sandals can wear leather socks, but he should cut them off below the ankles.' "
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّهُ قَالَ نَهَى رَسُولُ اللَّهِ ﷺ أَنْ يَلْبَسَ الْمُحْرِمُ ثَوْبًا مَصْبُوغًا بِزَعْفَرَانٍ أَوْ وَرْسٍ وَقَالَ " مَنْ لَمْ يَجِدْ نَعْلَيْنِ فَلْيَلْبَسْ خُفَّيْنِ وَلْيَقْطَعْهُمَا أَسْفَلَ مِنَ الْكَعْبَيْنِ " .