Messenger of Allah ﷺ wore a gold ring, then he threw it and said, "I will never wear it." The people also threw their (gold) rings.  

كَانَ رَسُولُ اللَّهِ ﷺ يَلْبَسُ خَاتَمًا مِنْ ذَهَبٍ فَنَبَذَهُ فَقَالَ لاَ أَلْبَسُهُ أَبَدًا فَنَبَذَ النَّاسُ خَوَاتِيمَهُمْ  

that he saw a silver ring on the hand of Messenger of Allah ﷺ for one day only. Then the people had silver rings made for themselves and wore it. On that, Messenger of Allah ﷺ threw away their rings as well. (For the details of this Hadith, see Fath-ul-Bari, Vol. 12, page 438).  

أَنَّهُ رَأَى فِي يَدِ رَسُولِ اللَّهِ ﷺ خَاتَمًا مِنْ وَرِقٍ يَوْمًا وَاحِدًا ثُمَّ إِنَّ النَّاسَ اصْطَنَعُوا الْخَوَاتِيمَ مِنْ وَرِقٍ وَلَبِسُوهَا فَطَرَحَ رَسُولُ اللَّهِ ﷺ خَاتَمَهُ فَطَرَحَ النَّاسُ خَوَاتِيمَهُمْ