Musnad Ahmad 504
It was narrated that Simak Harb said:
I heard Abbad bin Zahir Abu Ruwa` say: I heard ‘Uthman (رضي الله عنه) delivering a khutbah in which he said: By Allah, l accompanied the Messenger of Allah (ﷺ) whilst travelling and not traveling; he used to visit our sick, attend our funerals, go out on campaign with us and comfort us with whatever means he could. Some people tell me about him and perhaps none of them ever saw him.
حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنْ سِمَاكِ بْنِ حَرْبٍ، قَالَ سَمِعْتُ عَبَّادَ بْنَ زَاهِرٍ أَبَا رُوَاعٍ، قَالَ سَمِعْتُ عُثْمَانَ، رَضِيَ اللَّهُ عَنْهُ يَخْطُبُ فَقَالَ إِنَّا وَاللَّهِ قَدْ صَحِبْنَا رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي السَّفَرِ وَالْحَضَرِ وَكَانَ يَعُودُ مَرْضَانَا وَيَتْبَعُ جَنَائِزَنَا وَيَغْزُو مَعَنَا وَيُوَاسِينَا بِالْقَلِيلِ وَالْكَثِيرِ وَإِنَّ نَاسًا يُعْلِمُونِي بِهِ عَسَى أَنْ لَا يَكُونَ أَحَدُهُمْ رَآهُ قَطُّ‏.‏