Musnad Ahmad 555
It was narrated that Thumamah bin Hazn al-Qushairi said:
I was present at the house (of `Uthman) on the day `Uthman (رضي الله عنه) was killed. He looked out at them and said: Call for me your two companions who incited you against me. They were called for him and he said: I adjure you by Allah, do you know that when the Messenger of Allah (ﷺ)  came to Madinah, the mosque got too crowded for its people and he said: “Who will buy this piece of land with his own wealth and use it like the rest of the Muslims (i.e., donate it to the Muslims and share it with them) and he will have something better than it in Paradise?” So I bought it with my own wealth and donated it to the Muslims, but now you are preventing me from praying two rak’ahs in it! Then he said: I adjure you by Allah, do you know that when the Messenger of Allah (ﷺ) came to Madinah, there was no well good for drinking from except (the well of) Roomah. The Messenger of Allah (ﷺ) said: `Who will buy it with his own wealth and his bucket will be like that of the Muslims (i.e., donate the well to the Muslims and share it with them) and he will have something better than it in Paradise.” So I bought it with my own wealth, but now you are preventing me from drinking from it. Then he said: Do you know that I am the one who equipped the army of hardship (i.e., the army that went on the campaign of Tabook)? They said: By Allah, yes.
حَدَّثَنَا عَبْد اللَّهِ، حَدَّثَنِي مُحَمَّدُ بْنُ أَبِي بَكْرِ بْنِ عَلِيٍّ الْمُقَدَّمِيُّ، حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ الْأَنْصَارِيُّ، حَدَّثَنَا هِلَالُ بْنُ حِقٍّ، عَنِ الْجُرَيْرِيِّ، عَنْ ثُمَامَةَ بْنِ حَزْنٍ الْقُشَيْرِيِّ، قَالَ شَهِدْتُ الدَّارَ يَوْمَ أُصِيبَ عُثْمَانُ رَضِيَ اللَّهُ عَنْهُ فَاطَّلَعَ عَلَيْهِمْ اطِّلَاعَةً فَقَالَ ادْعُوا لِي صَاحِبَيْكُمْ اللَّذَيْنِ أَلَّبَاكُمْ عَلَيَّ فَدُعِيَا لَهُ فَقَالَ نَشَدْتُكُمَا اللَّهَ أَتَعْلَمَانِ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَمَّا قَدِمَ الْمَدِينَةَ ضَاقَ الْمَسْجِدُ بِأَهْلِهِ فَقَالَ مَنْ يَشْتَرِي هَذِهِ الْبُقْعَةَ مِنْ خَالِصِ مَالِهِ فَيَكُونَ فِيهَا كَالْمُسْلِمِينَ وَلَهُ خَيْرٌ مِنْهَا فِي الْجَنَّةِ فَاشْتَرَيْتُهَا مِنْ خَالِصِ مَالِي فَجَعَلْتُهَا بَيْنَ الْمُسْلِمِينَ وَأَنْتُمْ تَمْنَعُونِي أَنْ أُصَلِّيَ فِيهِ رَكْعَتَيْنِ ثُمَّ قَالَ أَنْشُدُكُمْ اللَّهَ أَتَعْلَمُونَ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَمَّا قَدِمَ الْمَدِينَةَ لَمْ يَكُنْ فِيهَا بِئْرٌ يُسْتَعْذَبُ مِنْهُ إِلَّا رُومَةَ فَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَنْ يَشْتَرِيهَا مِنْ خَالِصِ مَالِهِ فَيَكُونَ دَلْوُهُ فِيهَا كَدُلِيِّ الْمُسْلِمِينَ وَلَهُ خَيْرٌ مِنْهَا فِي الْجَنَّةِ فَاشْتَرَيْتُهَا مِنْ خَالِصِ مَالِي فَأَنْتُمْ تَمْنَعُونِي أَنْ أَشْرَبَ مِنْهَا ثُمَّ قَالَ هَلْ تَعْلَمُونَ أَنِّي صَاحِبُ جَيْشِ الْعُسْرَةِ قَالُوا اللَّهُمَّ نَعَمْ‏.‏