Sunan an-Nasa'i, Volume 6, Book 48, Hadith 5153 (DarusSalam) ⓘ
It was narrated from Mu'awiyah that : The Messenger of Allah [SAW] forbade wearing gold unless it was broken (into smaller pieces), and (he forbade) riding on Al-Mayathir.
أَخْبَرَنَا مُحَمَّدُ بْنُ بَشَّارٍ، قَالَ حَدَّثَنَا عَبْدُ الْوَهَّابِ، قَالَ حَدَّثَنَا خَالِدٌ، عَنْ مَيْمُونٍ، عَنْ أَبِي قِلاَبَةَ، عَنْ مُعَاوِيَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم نَهَى عَنْ لُبْسِ الذَّهَبِ إِلاَّ مُقَطَّعًا وَعَنْ رُكُوبِ الْمَيَاثِرِ .
also referenced under: Hadith 5150 (Reference) & Book 48, Hadith 111 (In-Book)