Sunan Ibn Majah, Book 1, Hadith 470 (In-Book) ⓘ
It was narrated that 'Uthman bin 'Affan said: "I saw the Messenger of Allah performing ablution and he wiped his head once."
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبَّادُ بْنُ الْعَوَّامِ، عَنْ حَجَّاجٍ، عَنْ عَطَاءٍ، عَنْ عُثْمَانَ بْنِ عَفَّانَ، قَالَ رَأَيْتُ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ تَوَضَّأَ فَمَسَحَ رَأْسَهُ مَرَّةً .
also referenced under: Hadith 435 (Reference) & Volume 1, Book 1, Hadith 435 (DarusSalam)