The Messenger of Allah [SAW] forbade wearing gold unless it was broken (into smaller pieces), and (he forbade) riding on Al-Mayathir. (Using translation from Nasāʾī 5150)
أَنَّ رَسُولَ اللهِ ﷺ «نَهَى عَنْ لُبْسِ الذَّهَبِ إِلَّا مُقَطَّعًا وَعَنْ رُكُوبِ الْمَيَاثِرِ»