It is narrated from Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him), he says: We waited for the Messenger of Allah (peace and blessings be upon him) one night for the 'Isha prayer, until about half the night had passed. Then the Prophet (peace and blessings be upon him) came and led us in prayer and said: Remain seated in your places, for indeed (the people of other mosques) have performed this prayer and gone to sleep, while you, from the time you have been waiting for this prayer, have been in prayer itself. And if it were not for the weakness of the weak, the illness of the sick, and the need of the needy, I would have delayed this prayer until half the night.