sleep in the quran and health sciences

background and objectives: sleep is a sign of the greatness of god. in this article sleep is described from quran and modern health sciences. methods: this is a qualitative systematic review. data were gathered from the quran, related islamic narratives and literatures. words that were searched included sleep,sleep stages, subaat, hojoo, ruqood, nu’ass, sinah. results: the results showed that the arabic words in the quran about sleep are sinah, nu’ass, hojoo, ruqood and subaa. these descriptions about sleep from quran perspective are consistent with different sleep stages that have been recognized by modern medicine. conclusion: the quran and hadith have described about the types of sleep and the importance and sleeping patterns. in quran perspective, human is a creature that needs light at day and darkness at night and sleep is an invisible blessing that merciful god gives peace and welfare to his creatures.