Shama-il Tirmidhi Chapter 12, Hadith Number 9 (98).
Hazrat Ibn Umar radiyallahu anhu relates that the Prophet of Allah sallallahu alaihe wasallam had a ring made of gold which he wore on his right hand. The Sahabah radiyallahu anhum in imitating the Prophet of Allah sallallahu alaihe wasallam also had gold rings made for themselves. Thereafter, the Prophet of Allah sallallah alaihe wasallam threw away the gold ring and said, “I will never wear it again.”
It was permissible to wear gold in the early periods of Islam. Subsequently, this was ordained haraam for men. All the Ulama are unanimous in that it is haraam for men to wear gold. Imam Nawawi has also stated the unanimous verdict of the Ulama in this respect. This subject is discussed at length in the books of fiqh. It will not be appropriate to discuss it here.