سُنَنُ أَبِي دَاوُدَ
Sunan Abi Dawud 5055
General Behavior (Kitab Al-Adab)
What to say when going to sleep
حَدَّثَنَا النُّفَيْلِيُّ، حَدَّثَنَا زُهَيْرٌ، حَدَّثَنَا أَبُو إِسْحَاقَ، عَنْ فَرْوَةَ بْنِ نَوْفَلٍ، عَنْ أَبِيهِ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ لِنَوْفَلٍ اقْرَأْ { قُلْ يَا أَيُّهَا الْكَافِرُونَ } ثُمَّ نَمْ عَلَى خَاتِمَتِهَا فَإِنَّهَا بَرَاءَةٌ مِنَ الشِّرْكِ .
Farwah b. Nawfal quoted his father as saying that the Prophet (ﷺ) said to Nawfal (his father): Recite (the Surah) 'Say, O you disbelievers!' and then go to sleep at its end, for it is a declaration of freedom from polytheism.
Sunan Abi Dawud, 5055Sahih (Al-Albani)صحيح (الألباني)