Prophet Muhammad saw would not go to sleep without reciting something form the Quran. When one recites the quran before going to sleep, he is protected from Shaytan, Insya Allah, and his dreams become truer in the meanings.
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1. Ayatul Kursi
Narrated by Abu Huraira:
Allah’s Apostle deputed me to keep Sadaqat (al-Fitr) of Ramadan. A comer came and started taking handfuls of the foodstuff (of the Sadaqa) (stealthily). I took hold of him and said, “By Allah, I will take you to Allah’s Apostle .” He said, “I am needy and have many dependents, and I am in great need.” I released him, and in the morning Allah’s Apostle asked me, “What did your prisoner do yesterday?” I said, “O Allah’s Apostle! The person complained of being needy and of having many dependents, so, I pitied him and let him go.” Allah’s Apostle said, “Indeed, he told you a lie and he will be coming again.” I believed that he would show up again as Allah’s Apostle had told me that he would return. So, I waited for him watchfully. When he (showed up and) started stealing handfuls of foodstuff, I caught hold of him again and said, “I will definitely take you to Allah’s Apostle. He said, “Leave me, for I am very needy and have many dependents. I promise I will not come back again.” I pitied him and let him go.
In the morning Allah’s Apostle asked me, “What did your prisoner do.” I replied, “O Allah’s Apostle! He complained of his great need and of too many dependents, so I took pity on him and set him free.” Allah’s Apostle said, “Verily, he told you a lie and he will return.” I waited for him attentively for the third time, and when he (came and) started stealing handfuls of the foodstuff, I caught hold of him and said, “I will surely take you to Allah’s Apostle as it is the third time you promise not to return, yet you break your promise and come.” He said, “(Forgive me and) I will teach you some words with which Allah will benefit you.” I asked, “What are they?” He replied, “Whenever you go to bed, recite “Ayat-al-Kursi”– ‘Allahu la ilaha illa huwa-l-Haiy-ul Qaiyum’ till you finish the whole verse. (If you do so), Allah will appoint a guard for you who will stay with you and no satan will come near you till morning. ” So, I released him. In the morning, Allah’s Apostle asked, “What did your prisoner do yesterday?” I replied, “He claimed that he would teach me some words by which Allah will benefit me, so I let him go.” Allah’s Apostle asked, “What are they?” I replied, “He said to me, ‘Whenever you go to bed, recite Ayat-al-Kursi from the beginning to the end —- Allahu la ilaha illa huwa-lHaiy-ul-Qaiyum—-.’ He further said to me, ‘(If you do so), Allah will appoint a guard for you who will stay with you, and no satan will come near you till morning.’ (Abu Huraira or another sub-narrator) added that they (the companions) were very keen to do good deeds. The Prophet said, “He really spoke the truth, although he is an absolute liar. Do you know whom you were talking to, these three nights, O Abu Huraira?” Abu Huraira said, “No.” He said, “It was Satan.”
Sahih Al Bukhari : Volume 3 : Book 38 : Hadith 505
2. Suratul Falaq – Al Mu’awwadhatain
3. Suratun Nas – Al Mu’awwadhatain
Both these surahs to be read three times with a dry spit on the hand one one cycle and to be wiped all over the body.
Book of Medicine
Bukhari :: Book 7 :: Volume 71 :: Hadith 644
Whenever Allah’s Apostle went to bed, he used to recite Surat-al-Ikhlas, Surat-al-Falaq and Surat-an-Nas and then blow on his palms and pass them over his face and those parts of his body that his hands could reach. And when he fell ill, he used to order me to do like that for him.
4. Al Kafiroon
General Behavior (Kitab Al-Adab)
Dawud :: Book 41 : Hadith 5037
The Prophet (peace_be_upon_him) said to Nawfal: Say , O infidels! and then sleep at its end, for it is a declaration of freedom from polytheism. (Al Albaanee ruled that it is authentic)
4. Al Mulk
5. As Sajdah
Jabir said, “The Messenger of Allah, may Allah bless him and grant him peace, did not sleep until he had recited, ‘Alif-Lam-Mim. The Sending-down’ (32) and ‘Blessed is the One in whose hand the kingdom is’ (67).’”
Related by Bukharee in Al Adab Al Mufrad. Al Albanee said it is authentic lighairihi
6. Recitation of the last two verses from Al Baqarah
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Bukhari :: Book 5 :: Volume 59 :: Hadith 345
Narrated Abu Masud Al-Badri:Allah’s Apostle said, “It is sufficient for one to recite the last two Verses of Surat-al-Baqara at night.”