Jami` at-Tirmidhi Book 48, Hadith 206
“We went out on a rainy and extremely dark night, looking for the Messenger of Allah (ﷺ), so that he could lead us in Salat.” He said: “So I met him and he (ﷺ) said: ‘Speak’ but I did not say anything. Then he (ﷺ) said: ‘Speak.’ But I did not say anything. He (ﷺ) said: ‘Speak.’ So I said: ‘What should I say?’ He (ﷺ) said: ‘Say: “Say: He is Allah, the One” and Al-Mu`awwidhatain, when you reach evening, and when you reach morning, three times, they will suffice you against everything.’”
“When you go to your bed, perform the Wudu’ as you would perform for Salat. Then lie on your right side, then say: ‘O Allah, I submit my face to You, and I entrust my affair to You, and I lay myself down relying upon You, hoping in You and fearing 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 (Allāhumma aslamtu wajhī ilaika wa fawwaḍtu amrī ilaika, wa alja’tu ẓahrī ilaika, raghbatan wa rahbatan ilaika, lā malja’a wa lā manjā minka illā ilaika, āmantu bikitābikalladhī anzalta wa bi-nabiyykalladhī arsalt).’ And if you die that night, you shall die upon the Fitrah” - Al-Bara’ said: I repeated it to retain it in memory, “So I said: ‘I believe in Your Messenger whom You have sent.’” He said: “So he (ﷺ) struck with his hand upon my chest, then said: ‘And in Your Prophet whom You have sent.’”
“The Messenger of Allah (ﷺ) stayed with my father.” So he said: “We brought some food near him, so he ate from it, then he was brought dates, so he would eat it and cast the pit with his two fingers” - he joined between his forefinger and middle finger - Shu`bah said: “And that is what I think concerning it, if Allah wills.” - “and he cast the pit between two fingers, then he was brought drink, so he drank it and then passed it to the one on his right.” He said: “So my father said - as he took hold of the rein of his beast: ‘Supplicate for us.’ So he said: ‘O Allah, bless for them what You have provided them, and forgive them, and have mercy on them (Allāhumma bārik lahum fī mā razaqtahum waghfir lahum warḥamhum).’”