Allahu la ilaha illa Huwa, Al-Haiyul-Qaiyum La ta'khudhuhu sinatun wa la nawm, lahu ma fis-samawati wa ma fil-'ard Man dhal-ladhi yashfa'u 'indahu illa bi-idhnihi Ya'lamu ma baina aidihim wa ma khalfahum, wa la yuhituna bi shai'im-min 'ilmihi illa bima sha'a Wasi'a kursiyuhus-samawati wal ard, wa la ya'uduhu hifdhuhuma Wa Huwal 'Aliyul-Adheem
"Allah! There is no god but He - the Living, The Self-subsisting, Eternal. No slumber can seize Him Nor Sleep. His are all things In the heavens and on earth. Who is there can intercede In His presence except As he permitteth? He knoweth What (appeareth to His creatures As) Before or After or Behind them. Nor shall they compass Aught of his knowledge Except as He willeth. His throne doth extend Over the heavens And on earth, and He feeleth No fatigue in guarding And preserving them, For He is the Most High. The Supreme (in glory)."
[Surah al-Baqarah 2: 255]
Abu Hurairah (radiAllahu anhu) narrated; In Surah al-Baqaraah there is an ayah which is the best of all the ayahs of the Qur’an. It is never recited in a house but the Shaytan leaves: Ayat al-Kursi.
When you lie down in your bed, recite ayat al-Kursi, Allah! La ilaha illa Huwa (none has the right to be worshipped but He), the Ever Living, the One Who sustains and protects all that exists… [al-Baraqah 2:255] until the end of the ayah, then you will have a protector from Allah and no shaytan (devil) will come near you until morning comes
[Sahih al-Bukhari]
