Sahih al-Bukhari, Hadith 7004 ⓘ

Narrated Az-Zuhri: Regarding the above narration, The Prophet said, "I do not know what Allah will do to him (Uthman bin Maz'un)." Um Al-`Ala said, "I felt very sorry for that, and then I slept and saw in a dream a flowing spring for `Uthman bin Maz'un, and told Allah's Messenger of that, and he said, "That flowing spring symbolizes his good deeds."

حَدَّثَنَا أَبُو الْيَمَانِ، أَخْبَرَنَا شُعَيْبٌ، عَنِ الزُّهْرِيِّ، بِهَذَا وَقَالَ ‏"‏ مَا أَدْرِي مَا يُفْعَلُ بِهِ ‏"‏‏.‏ قَالَتْ وَأَحْزَنَنِي فَنِمْتُ، فَرَأَيْتُ لِعُثْمَانَ عَيْنًا تَجْرِي، فَأَخْبَرْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم فَقَالَ ‏"‏ ذَلِكَ عَمَلُهُ ‏"‏‏.‏