The Prophet (May Allah’s peace and blessings be upon him) said: “Take a nap because the devils do not take a nap.” [Abu Na’eem]
Anas (May Allah be pleased with him) narrated: “The Messenger of Allah (May Allah’s peace and blessings be upon him) was sitting with us, and he dozed off, then he lifted his head and smiled.” [Muslim]
Almighty Allah said: “Neither slumber, nor sleep overtake Him.” Al-Baqarah (2:255)
Almighty Allah said: “ ” An-Naba’ (78:9)
Similar to sinah and it is the introduction or beginning of sleep, and an indication that the body needs rest.
Almighty Allah said: “ ” Al-Anfal (8:11)
Almighty Allah said: “ ” Al-Kahf (18:18)