What is to be said at the time of Sleeping

Al-Bara' bin 'Azib (May Allah be pleased with them) reported:
Whenever Messenger of Allah ﷺ went to bed, he would lie down on his right side and recite: "Allahumma aslamtu nafsi ilaika, wa wajjahtu wajhi ilaika, wa fawwadtu amri ilaika, wa 'alja'tu zahri ilaika, raghbatan wa rahbatan ilaika, la malja'a wa la manja illa ilaika. Amantu bikitabikal-ladhi anzalta, wa nabiyyikal-ladhi arsalta [O Allah! I have submitted myself to You, I have turned my face to You, committed my affairs to You, and depend on You for protection out of desire for You and out of fear of You (expecting Your reward and fearing Your punishment). There is no refuge and no place of safety from You but with You. I believed in the Book You have revealed, and in the Prophet You have sent (i.e., Muhammad ﷺ).]"

[Al-Bukhari].

عن البراء بن عازب رضى الله عنهما قال: كان رسول الله ﷺ ِإذا أوى إلى فراشه نام على شقه الأيمن، ثم قال: " اللهم أسلمت نفسي إليك، ووجهت وجهي إليك، وفوضت أمري إليك، وألجأت ظهري إليك، رغبة ورهبة إليك، لا ملجأ ولا منجى منك إلا إليك. آمنت بكتابك الذي أنزلت . ونبيك الذي أرسلت". (1).

Al-Bara' bin 'Azib (May Allah be pleased with them) reported:
Messenger of Allah ﷺ directed me thus: "Whenever you go to bed, perform Wudu' as you do for Salat then (before sleeping) recite: 'O Allah! I have submitted myself to You, I have turned myself to You, committed my affairs to You and sought Your refuge for protection out of desire for You and fear of You (expecting Your reward and fearing Your punishment). There is no refuge and no place of safety from You but with You. I believe in the Book You have revealed and in the Prophet ﷺ You have sent."' Messenger of Allah ﷺ added: "If anyone recites these words and dies during the night, he will die on the true Deen, and if he remains alive till the morning, he will obtain good. And make this supplication your last words (before sleeping)."

[Al-Bukhari and Muslim].

وعنه قال: قال لي رسول الله ﷺ : "إذا أتيت مضجعك فتوضأ وضوءك للصلاة، ثم اضطجع على شقك الأيمن ، وقل ... " وذكر نحوهن وفيه: " واجعلهن آخر ما تقول" .

'Aishah (May Allah be pleased with her) reported:
The Prophet ﷺ used to offer eleven Rak'ah of optional Salat (prayers) in the latter part of night. When it was about dawn, he would offer two short Rak'ah and then would lie down on his right side till the Mu'adhdhin (one who calls for prayer) would come to inform him that the congregation had gathered (for prayer).

[Al-Bukhari and Muslim].

وعن عائشة رضى الله عنها قالت: كان النبي ﷺ يصلى من الليل إحدى عشرا ركعة، فإذا طلع الفجر صلى ركعتين خفيفتين ، ثم اضطجع على شقه الأيمن حتى يجئ المؤذن فيؤذنه .

Hudhaifah (May Allah be pleased with him) reported:
Whenever the Prophet ﷺ lay down for sleep at night, he would place his (right) hand under his (right) cheek and supplicate: "Allahumma bismika amutu wa ahya [O Allah, with Your Name will I die and live (wake up)]." And when he woke up, he would supplicate: "Al-hamdu lillahil-ladhi ahyana ba'da ma amatana, wa ilaihin-nushur (All praise is due to Allah, Who has brought us back to life after He has caused us to die, and to Him is the return)."

[Al-Bukhari].

وعن حذيفة رضى الله عنه قال:كان النبي ﷺ إذا أخذ مضجعه من الليل وضع يده تحت خده، ثم يقول: "اللهم باسمك أموت وأحيا" وإذا استيقظ قال: "الحمد لله الذي أحيانا بعد ما أماتنا وإليه النشور" .

Ya'ish bin Tikhfah Al-Ghifari (May Allah be pleased with him) reported:
My father said: I was lying down on my belly in the mosque when someone shook me with his foot and said, "Lying down this way is disapproved by Allah." I looked up and saw that it was Messenger of Allah ﷺ.

[Abu Dawud].

وعن يعيش بن طخفة الغفارى رضى الله عنه قال: قال أبى: بينما أنا مضطجع في المسجد على بطني إذا رجل يحركني برجله فقال: "إن هذه ضجعة يبغضها الله" قال: فنظرت ، فإذا رسول الله ﷺ. .