حَدَّثَنَا النُّفَيْلِيُّ، حَدَّثَنَا زُهَيْرٌ، حَدَّثَنَا أَبُو إِسْحَاقَ، عَنْ فَرْوَةَ بْنِ نَوْفَلٍ، عَنْ أَبِيهِ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ لِنَوْفَلٍ ‏"‏ اقْرَأْ ‏ Begin hadith 9‏ ثُمَّ نَمْ عَلَى خَاتِمَتِهَا فَإِنَّهَا بَرَاءَةٌ مِنَ الشِّرْكِ ‏"‏ ‏.‏

Farwah b. Nawfal quoted his father as saying that the Prophet (PBUH) 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. Translation Not Available

Book Ref: Sunan Abi Dawud Book 43 Hadith 5055
Web Ref:  Sunan Abi Dawud Book 42 Hadith 5037