Sahih Bukhari Volume 1, Book 10, Hadith Number 546

Narated By Anas : The Prophet delayed the’lsha’ prayer till midnight and then he offered the prayer and said, “The people prayed and slept but you have been in prayer as long as you have been waiting for it (the prayer).” Anas added: As if I am looking now at the glitter of the ring of the Prophet on that night.