What is the ruling on delaying sleep such that it leads to not waking up for prayer? And does the ruling differ if not waking up for prayer is unrelated to the time of sleep? And is it obligatory to sleep early even without feeling sleepy? And is it obligatory to postpone work until the next day to ensure early sleep? And what is the Shar'i (Islamic legal) criterion for a late bedtime?
Staying up late is inherently disliked, especially for those who miss Fajr prayer because of it. Some scholars have even made it obligatory to sleep early for anyone who misses the prayer due to staying up late. A person is considered sinful if missing the prayer is due to sleeping late or neglecting the means that help one wake up.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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