Sahih Bukhari | Volume 1 | Hadith Number 630
Narrated by Humaid
Anas was asked, "Did Allah's Apostle wear a ring?" He said, "Yes. Once he delayed the 'Isha prayer till mid-night and after the prayer, he faced us and said, 'The people prayed and have slept and you remained in prayer as long as you waited for it.'" Anas added, "As if I were just now observing the glitter of his ring."