Hadith 507970
Chapter 20: Hajj - كتاب الحج
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.
Reference Muwatta Malik 507970
USC-MSA web (English) reference : Book 20, Hadith 95