Musnad Ahmad 526
It was narrated from Muslim Abu Sa`eed, the freed slave of `Uthman bin `Affan (رضي الله عنه) that  `Uthman bin `Affan manumitted twenty slaves, and called for some pants and put them on; he had never worn them before, either during the Jahiliyyah or in Islam. And he said:
I saw the Messenger of Allah (ﷺ) in a dream last night, and I saw Abu Bakr and `Umar (رضي الله عنهما) and they said to me, Be patient, for you will break your fast with us tomorrow. Then he called for a Mushaf and opened it, and he was killed with it in front of him.
حَدَّثَنَا عَبْد اللَّهِ، حَدَّثَنَا عُثْمَانُ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا يُونُسُ بْنُ أَبِي الْيَعْفُورِ الْعَبْدِيُّ، عَنْ أَبِيهِ، عَنْ مُسْلِمٍ أَبِي سَعِيدٍ، مَوْلَى عُثْمَانَ بْنِ عَفَّانَ أَنَّ عُثْمَانَ بْنَ عَفَّانَ، أَعْتَقَ عِشْرِينَ مَمْلُوكًا وَدَعَا بِسَرَاوِيلَ فَشَدَّهَا عَلَيْهِ وَلَمْ يَلْبَسْهَا فِي جَاهِلِيَّةٍ وَلَا إِسْلَامٍ وَقَالَ إِنِّي رَأَيْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ الْبَارِحَةَ فِي الْمَنَامِ وَرَأَيْتُ أَبَا بَكْرٍ وَعُمَرَ رَضِيَ اللَّهُ عَنْهُمَا وَإِنَّهُمْ قَالُوا لِي اصْبِرْ فَإِنَّكَ تُفْطِرُ عِنْدَنَا الْقَابِلَةَ ثُمَّ دَعَا بِمُصْحَفٍ فَنَشَرَهُ بَيْنَ يَدَيْهِ فَقُتِلَ وَهُوَ بَيْنَ يَدَيْهِ‏.‏