Humayd al-Tawil (may Allah have mercy on him) says that someone asked Sayyiduna Anas (may Allah be pleased with him): Did the Messenger of Allah (peace and blessings be upon him) keep a ring? He said: Yes! One night the Messenger of Allah (peace and blessings be upon him) delayed the Isha prayer until close to midnight. Then, when he (peace and blessings be upon him) had led the prayer, after the prayer he turned towards us and said: "The people have prayed and gone to sleep, but as long as you were waiting for the prayer, you remained in prayer." Sayyiduna Anas (may Allah be pleased with him) says: It is as if I can still see the gleam of his (peace and blessings be upon him) ring.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3031