116. Ayatul Kursi

اَللَّهُ لَآ إِلٰهَ إِلَّا هُوَ الْحَىُّ الْقَيُّومُ ۚ لَا تَأْخُذُهُۥ سِنَةٌ وَلَا نَوْمٌ ۚ لَّهُۥ مَا فِى السَّمٰوٰتِ وَمَا فِى الْأَرْضِ ۗ مَنْ ذَا الَّذِى يَشْفَعُ عِنْدَهُۥٓ إِلَّا بِإِذْنِهِۦ ۚ يَعْلَمُ مَا بَيْنَ أَيْدِيهِمْ وَمَا خَلْفَهُمْ ۖ وَلَا يُحِيطُونَ بِشَىْءٍ مِّنْ عِلْمِهِۦٓ إِلَّا بِمَا شَآءَ ۚ وَسِعَ كُرْسِيُّهُ السَّمٰوٰتِ وَالْأَرْضَ ۖ وَلَا يَـُٔودُهُۥ حِفْظُهُمَا ۚ وَهُوَ الْعَلِىُّ الْعَظِيمُ

Allahu laa 'ilaaha 'illaa Huwal-Hayyul-Qayyoom, laa ta'khudhuhu sinatun wa laa nawm, lahu maa fis-samaawaati wa maa fil-'ardh, man dhal-ladhee yashfa'u 'indahu 'illaa bi'idh nih, ya'lamu maa bayna 'aydeehim wa maa khalfahum, wa laa yuheetoona bishay'im-min 'ilmihi 'illaa bimaa shaa'a, wasi'a kursiyyuhus-samaawaati wal'ardh, wa laa ya'ooduhu hifdhuhumaa, wa Huwal-'Aliyyul- 'Adheem

Whoever reads Ayatul Kursi when he lies down to sleep will have a guardian from Allah remain with him and Satan will not be able to come near him until he rises in the morning.