Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
nasai-kubra:8437Aḥmad b. Sulaymān > ʿUbaydullāh > Isrāʾīl > Abū Isḥāq > al-ʿAlāʾ b. ʿArār

[Machine] "I asked Ibn Umar while he was in the mosque of the Messenger of Allah ﷺ about Ali and Uthman. He said, 'As for Ali, do not ask me about him, but look at his house from the house of the Messenger of Allah ﷺ . There is no house in the mosque other than his house. As for Uthman, indeed he committed a great sin when the two groups met, but Allah forgave him and pardoned him. And he committed a sin among you that led to his killing.'"  

الكبرى للنسائي:٨٤٣٧أَخْبَرَنَا أَحْمَدُ بْنُ سُلَيْمَانَ قَالَ حَدَّثَنَا عُبَيْدُ اللهِ قَالَ حَدَّثَنَا إِسْرَائِيلُ عَنْ أَبِي إِسْحَاقَ عَنِ الْعَلَاءِ بْنِ عَرَارٍ قَالَ

سَأَلْتُ ابْنَ عُمَرَ وَهُوَ فِي مَسْجِدِ الرَّسُولِ ﷺ عَنْ عَلِيٍّ وَعُثْمَانَ فَقَالَ «أَمَّا عَلِيٌّ فَلَا تَسَلْنِي عَنْهُ وَانْظُرْ إِلَى مَنْزِلِهِ مِنْ رَسُولِ اللهِ ﷺ لَيْسَ فِي الْمَسْجِدِ بَيْتٌ غَيْرَ بَيْتِهِ وَأَمَّا عُثْمَانُ فَإِنَّهُ أَذْنَبَ ذَنْبًا عَظِيمًا تَوَلَّى يَوْمَ الْتَقَى الْجَمْعَانِ فَعَفَا اللهُ عَنْهُ وَغَفَرَ لَهُ وَأَذْنَبَ فِيكُمْ ذَنْبًا دُونَ فَقَتَلْتُمُوهُ»