Narrated Az-Zuhri:

Regarding the above narration, The Prophet ﷺ 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 Apostle 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 ﷺ فَقَالَ " ذَلِكَ عَمَلُهُ ".