question #3 Sahih al-Bukhari 6313, Book 80, Hadith 10 : What are the benefits of reciting a particular dua before sleeping in terms of one’s faith?

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 `Amri 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”