Recite (the Surah) 'Say, O you disbelievers!' and then go to sleep at its end, for it is a declaration of freedom from polytheism.
أَنَّ النَّبِيَّ ﷺ قَالَ لِنَوْفَلٍ اقْرَأْ { قُلْ يَا أَيُّهَا الْكَافِرُونَ } ثُمَّ نَمْ عَلَى خَاتِمَتِهَا فَإِنَّهَا بَرَاءَةٌ مِنَ الشِّرْكِ