It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that he was asked: Did the Messenger of Allah (peace and blessings be upon him) have a ring made? He said: Yes! One night he (peace and blessings be upon him) delayed the Isha prayer until half of the night. When he (peace and blessings be upon him) had led the prayer, he turned his face towards us and said: "The people have prayed and gone to sleep, and you have remained in prayer ever since you have been waiting for the prayer." It is as if I am looking at the gleam of his ring.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 1754