'Uthman ibn 'Affan was a wealthy merchant, but he was known above all for his modesty and generosity.
❝ Hadith'A'ishah narrated that when 'Uthman came in, the Messenger of Allah ﷺ sat up and arranged his clothing. Asked about it later, he said: should I not feel shy before a man before whom the angels feel shy?Sahih Muslim 2401 · Sahih
Madinah had few wells of sweet water. He bought the well of Rumah and opened it to everyone, and in a hard time he gave great wealth to equip the army of Tabuk.
❝ Hadith'Uthman himself reminded the Companions: do you not know that the Messenger of Allah ﷺ said, whoever digs the well of Rumah will have Paradise — and I did it? And he said, whoever equips the army of hardship will have Paradise — and I equipped it? They confirmed what he said.Sahih al-Bukhari 2778 · Sahih
As caliph he had the Quran written in one mushaf with a single recitation and sent copies to the regions, so that people would not differ over the reading of the Quran.