Sahih Muslim 6884
صحيح مسلم#6884SahihAl-Bara' b. 'Azib reported that Allah's Messenger (in may peace be upon him) commanded a person (in these words):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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 48:77