It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) once delayed the ‘Isha prayer so much that those who usually prayed had already prayed, those who stayed awake remained awake, those who slept had gone to sleep, and those who performed Tahajjud had performed Tahajjud. Then the Prophet (peace and blessings be upon him) came and said: If I did not fear hardship for my Ummah, I would have commanded them to perform this prayer at this time.