Sahih Bukhari
Sahih Bukhari Volume 007, Book 072, Hadith Number 755.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 72. Dress
Narrated By 'Abdullah : Allah's Apostle wore a gold or silver... ring and placed its stone towards the palm of his hand. The people also started wearing gold rings like it, but when the Prophet saw them wearing such rings, he threw away that golden ring and then wore a silver ring.