Sayyiduna Ali (may Allah be pleased with him) said: I used to feel very sleepy, so much so that when I would perform the Maghrib prayer and my clothes were on me, I would sleep right there. I asked the Prophet (peace and blessings be upon him) about this issue, so the Prophet (peace and blessings be upon him) permitted me to sleep before ‘Isha (on the condition that I would wake up for the ‘Isha prayer).