عَنْ مُهَاجِرٍ أَبِي الْحَسَنِ رَضِيَ اللَّهُ عَنْهُ عَنْ شَيْخٍ أَدْرَكَ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ خَرَجْتُ مَعَ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فِي سَفَرٍ فَمَرَّ بِرَجُلٍ يَقْرَأُ قُلْ يَا أَيُّهَا الْكَافِرُونَ [سورة الكافرون] قَالَ أَمَّا هَذَا فَقَدْ بَرِئَ مِنَ الشِّرْكِ قَالَ وَإِذَا آخَرُ يَقْرَأُ قُلْ هُوَ اللَّهُ أَحَدٌ [سورة الإخلاص] فَقَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ بِهَا وَجَبَتْ لَهُ الْجَنَّةُ
Muhajir Abu Hasan narrates from an elder who met the Noble Prophet (peace and blessings be upon him), he says: I was with the Noble Prophet (peace and blessings be upon him) on a journey. The Prophet (peace and blessings be upon him) passed by a man who was reciting Surah Al-Kafirun. The Prophet (peace and blessings be upon him) said: He has become free from shirk (polytheism). Another man was reciting Surah Al-Ikhlas, about whom the Noble Prophet (peace and blessings be upon him) said: Through this Surah, Paradise has become obligatory for this man.