مُوَطَّأُ مَالِكٍ
Muwatta Malik 797
Hajj
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ أَيُّوبَ بْنِ مُوسَى، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، نَظَرَ فِي الْمِرْآةِ لِشَكْوٍ كَانَ بِعَيْنَيْهِ وَهُوَ مُحْرِمٌ .
Yahya related to me from Malik from Ayyub ibn Musa that Abdullah ibn Umar once looked in the mirror for something that was irritating him while he was in ihram.
Arabic/English book reference: Book 20, Hadith 95