Sahih Bukhari
Call to Prayers (Adhaan)
Volume: 001 / Book Number: 011 / Hadith Number: 630
Narrated 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."