Musnad Ahmad 422
It was narrated that Nubaih bin Wahb said:
`Umar bin `Ubaidullah sent word to Aban bin `Uthman (رضي الله عنه), (to ask) whether he could apply something to his eyes when he was in ihram - or (to ask) what he could apply to his eyes when he was in ihram. He sent word back to him telling him that he could apply aloes to them, and I heard `Uthman bin Affan(رضي الله عنه) narrating that from the Messenger of Allah (ﷺ) .
حَدَّثَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنْ أَيُّوبَ، عَنْ نَافِعٍ، عَنْ نُبَيْهِ بْنِ وَهْبٍ، قَالَ أَرْسَلَ عُمَرُ بْنُ عُبَيْدِ اللَّهِ إِلَى أَبَانَ بْنِ عُثْمَانَ رَضِيَ اللَّهُ عَنْهُ أَيُكَحِّلُ عَيْنَيْهِ وَهُوَ مُحْرِمٌ أَوْ بِأَيِّ شَيْءٍ يُكَحِّلُهُمَا وَهُوَ مُحْرِمٌ فَأَرْسَلَ إِلَيْهِ أَنْ يُضَمِّدَهُمَا بِالصَّبِرِ فَإِنِّي سَمِعْتُ عُثْمَانَ بْنَ عَفَّانَ رَضِيَ اللَّهُ عَنْهُ يُحَدِّثُ ذَلِكَ عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ‏.‏