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.
darimi:735Mālik b. Ismāʿīl > Isrāʾīl > ʿĀmir b. Shaqīq > Shaqīq b. Salamah

[Machine] I saw Uthman perform ablution, then he wiped his head and both of his ears, both the outside and the inside of them. Then he said, "I saw the Messenger of Allah ﷺ do as I have done or similar to what I have done."  

الدارمي:٧٣٥أَخْبَرَنَا مَالِكُ بْنُ إِسْمَاعِيلَ حَدَّثَنَا إِسْرَائِيلُ عَنْ عَامِرِ بْنِ شَقِيقٍ عَنْ شَقِيقِ بْنِ سَلَمَةَ قَالَ

رَأَيْتُ عُثْمَانَ تَوَضَّأَ فَمَسَحَ بِرَأْسِهِ وَأُذُنَيْهِ ظَاهِرِهِمَا وَبَاطِنِهِمَا ثُمَّ قَالَ «رَأَيْتُ رَسُولَ اللَّهِ ﷺ صَنَعَ كَمَا صَنَعْتُ أَوْ كَالَّذِي صَنَعْتُ»