When you go to bed during night, you should say:" O Allah, I surrender myself to Thee and entrust my affair to Thee, with hope in Thee and fear of Thee. There is no resort and no deliverer (from hardship but Thou). I affirm my faith in the Book which Thou revealed and in the Messengers whom Thou sent." If you die in this state you would die on Fitra, and Ibn Bashshdr did not make a mention of" night" in this hadith.  

أَنَّ رَسُولَ اللَّهِ ﷺ أَمَرَ رَجُلاً إِذَا أَخَذَ مَضْجَعَهُ مِنَ اللَّيْلِ أَنْ يَقُولَ اللَّهُمَّ أَسْلَمْتُ نَفْسِي إِلَيْكَ وَوَجَّهْتُ وَجْهِي إِلَيْكَ وَأَلْجَأْتُ ظَهْرِي إِلَيْكَ وَفَوَّضْتُ أَمْرِي إِلَيْكَ رَغْبَةً وَرَهْبَةً إِلَيْكَ لاَ مَلْجَأَ وَلاَ مَنْجَا مِنْكَ إِلاَّ إِلَيْكَ آمَنْتُ بِكِتَابِكَ الَّذِي أَنْزَلْتَ وَبِرَسُولِكَ الَّذِي أَرْسَلْتَ فَإِنْ مَاتَ مَاتَ عَلَى الْفِطْرَةِ وَلَمْ يَذْكُرِ ابْنُ بَشَّارٍ فِي حَدِيثِهِ مِنَ اللَّيْلِ  

the Prophet (saas) said to a man: "When you go to lay down, or go to your bed, say: Allahumma aslamtu wajhi ilayka, wa al-ja'tu zahri ilayka, wa fawwadtu amri ilayka, raghbatan wa rahbatan ilayka, la malja'a wa la manja'a minka illa ilayka, amantu bi kitabikal-ladhi anzalta, wa nabiyyikal arsalta [O Allah, I have submitted my face (i.e., myself) to You, and I am under Your command (i.e., I depend upon You in all my affairs), and I put my trust in You, hoping for Your reward and fearing Your punishment. There is no fleeing from You and no refuge from You except with You. I believe in Your Book that You have revealed and in Your Prophet whom You have sent).' Then if you die that night, you will die in a state of the Fitrah (nature), and if you wake in the morning you will wake with a great deal of good." (Using translation from Ibn Mājah 3876)   

أَنَّ رَسُولَ اللهِ ﷺ أَمَرَ رَجُلًا مِنَ الْأَنْصَارِ أَنْ يَقُولَ إِذَا أَخَذَ مَضْجَعَهُ اللهُمَّ أَسْلَمْتُ نَفْسِي إِلَيْكَ وَوَجَّهْتُ وَجْهِي إِلَيْكَ وَفَوَّضْتُ أَمْرِي إِلَيْكَ وَأَلْجَأْتُ ظَهْرِي إِلَيْكَ رَغْبَةً وَرَهْبَةً إِلَيْكَ لَا مَلْجَأَ وَلَا مَنْجَا مِنْكَ إِلَّا إِلَيْكَ آمَنْتُ بِكِتَابِكَ الَّذِي أَنْزَلْتَ وَنَبِيِّكَ الَّذِي أَرْسَلْتَ فَإِنْ مَاتَ مَاتَ عَلَى الْفِطْرَةِ  

That the Prophet ﷺ advised a man, saying, "If you intend to lie down (i.e. go to bed), say, 'Allahumma aslamtu nafsi ilaika wa fauwadtu ʿAmri ilaika, wa wajjahtu wajhi ilaika wa alja'tu zahri ilaika, reghbatan wa rahbatan ilaika. La malja'a wa la manja minka illa ilaika. Amantu bikitabikal-ladhi anzalta; wa nabiyyikalladhi arsalta.' And if you should die then (after reciting this before going to bed) you will die on the religion of Islam" (Using translation from Bukhārī 6313)   

أَنَّهُ سَمِعَ النَّبِيَّ ﷺ يُوصِي رَجُلًا إِذَا أَخَذَ مَضْجَعَهُ أَنْ يَقُولَ «اللهُمَّ أَسْلَمْتُ نَفْسِي إِلَيْكَ وَوَجَّهْتُ وَجْهِي إِلَيْكَ وَفَوَّضْتُ أَمْرِي إِلَيْكَ وَأَلْجَأْتُ ظَهْرِي إِلَيْكَ رَغْبَةً وَرَهْبَةً إِلَيْكَ لَا مَنْجَى وَلَا مَلْجَأَ مِنْكَ إِلَّا إِلَيْكَ آمَنْتُ بِنَبِيِّكَ الَّذِي أَرْسَلْتَ وَبِكِتَابِكَ الَّذِي أَنْزَلْتَ فَإِنْ مَاتَ مَاتَ عَلَى الْفِطْرَةِ»  

Messenger of Allah ﷺ said, "O so-and-so, whenever you go to your bed (for sleeping) say, 'O Allah! I have surrendered myself over to you and have turned my face towards You, and leave all my affairs to You and depend on You and put my trust in You expecting Your reward and fearing Your punishment. There is neither fleeing from You nor refuge but with You. I believe in the Book (Qur'an) which You have revealed and in Your Prophet (Muhammad) whom You have sent.' If you then die on that night, then you will die as a Muslim, and if you wake alive in the morning then you will receive the reward." (See Hadith No. 323, Vol. 8) (Using translation from Bukhārī 7488)  

قَالَ رَسُولُ اللهِ ﷺ إِذَا أَوَيْتَ إِلَى فِرَاشِكَ فَقُلِ اللهُمَّ أَسْلَمْتُ نَفْسِي إِلَيْكَ وَوَجَّهْتُ وَجْهِي إِلَيْكَ وَفَوَّضْتُ أَمْرِي إِلَيْكَ وَأَلْجَأْتُ ظَهْرِي إِلَيْكَ رَغْبَةً وَرَهْبَةً إِلَيْكَ لَا مَلْجَأَ وَلَا مَنْجَى مِنْكَ إِلَّا إِلَيْكَ آمَنْتُ بِكِتَابِكَ الَّذِي أَنْزَلْتَ وَبِنَبِيِّكَ الَّذِي أَرْسَلْتَ فَإِنْ مُتَّ مِنْ لَيْلَتِكَ مُتَّ وَأَنْتَ عَلَى الْفِطْرَةِ وَإِنْ أَصْبَحْتَ أَصْبَحْتَ خَيْرًا  

That the Prophet ﷺ advised a man, saying, "If you intend to lie down (i.e. go to bed), say, 'Allahumma aslamtu nafsi ilaika wa fauwadtu ʿAmri ilaika, wa wajjahtu wajhi ilaika wa alja'tu zahri ilaika, reghbatan wa rahbatan ilaika. La malja'a wa la manja minka illa ilaika. Amantu bikitabikal-ladhi anzalta; wa nabiyyikalladhi arsalta.' And if you should die then (after reciting this before going to bed) you will die on the religion of Islam" (Using translation from Bukhārī 6313)   

أَنَّ رَسُولَ اللهِ ﷺ أَمَرَ رَجُلًا إِذَا أَخَذَ مَضْجَعَهُ أَنْ يَقُولُ «اللهُمَّ أَسْلَمْتُ نَفْسِي إِلَيْكَ وَوَجَّهْتُ وَجْهِي إِلَيْكَ وَأَلْجَأْتُ ظَهْرِي إِلَيْكَ وَفَوَّضْتُ أَمْرِي إِلَيْكَ رَغْبَةً وَرَهْبَةً إِلَيْكَ لَا مَنْجَى وَلَا مَلْجَأَ مِنْكَ إِلَّا إِلَيْكَ آمَنْتُ بِكِتَابِكَ الَّذِي أَنْزَلْتَ وَرَسُولِكَ الَّذِي أَرْسَلْتَ فَإِنْ مَاتَ مَاتَ عَلَى الْفِطْرَةِ»  

[Machine] The Messenger of Allah ﷺ said, "When any of you lies down at night, he should put his right hand under his cheek and then say: 'In the name of Allah, O Allah, I surrender myself to You, I submit my back to You, I entrust my affairs to You, and I turn my face towards You out of fear and hope of You. There is no refuge nor escape from You except to You. I believe in Your Book which You have revealed, and in Your Prophet whom You have sent.' Whoever says this and then dies, he will die upon the Fitrah (the natural uncorrupted state).  

قَالَ رَسُولُ اللهِ ﷺ إِذَا أَخَذَ أَحَدُكُمْ مَضْجَعَهُ مِنَ اللَّيْلِ فَلْيَتَوَسَّدْ يَمِينَهُ ثُمَّ لِيَقُلْ بِاسْمِ اللهِ اللهُمَّ أَسْلَمْتُ نَفْسِي إِلَيْكَ وَأَلْجَأْتُ ظَهْرِي إِلَيْكَ وَفَوَّضْتُ أَمْرِي إِلَيْكَ وَوَجَّهْتُ وَجْهِي إِلَيْكَ رَهْبَةً مِنْكَ وَرَغْبَةً إِلَيْكَ لَا مَلْجَأَ وَلَا مَنْجَى مِنْكَ إِلَّا إِلَيْكَ آمَنْتُ بِكِتَابِكَ الْمَنْزِلِ وَبِنَبِيِّكَ الْمُرْسَلِ مَنْ قَالَهَا ثُمَّ مَاتَ مَاتَ عَلَى الْفِطْرَةِ  

"عَنِ الْبَرَاء أَنَّ النَّبِىَّ ﷺ قَالَ: إِذَا أَخَذْتَ مَضْجَعَكَ فَقُلْ: اللَّهُمَّ إِنِّى أسْلَمْتُ نَفْسِى إِلَيْكَ، وَوَجَّهْتُ وَجْهِى إِلَيْكَ، وَفَوَّضْتُ أَمْرِى إِلَيْكَ، وَأَلْجَأتُ ظَهْرِى إِلَيْكَ، رَهْبَةً وَرَغْبَةً إِلَيْكَ، لاَ مَنْجَا وَلاَ مَلْجَأَ مِنْكَ إِلاَّ إِلَيْكَ، آمَنْتُ بِكِتَابِكَ الَّذِى أَنْزَلْتَ، وَنَبِيِّكَ الَّذِى أَرْسَلْتَ، فَإِنْ مِتَّ مِنْ لَيْلَتِكَ مِتَّ عَلَى الْفِطْرَةِ، وَإِنْ أصْبحْتَ أصْبَحْتَ وَقَدْ أَصَبْتَ خَيْرًا".