Sahih Bukhari 4703

حَدَّثَنِي مُحَمَّدُ بْنُ بَشَّارٍ ، حَدَّثَنَا غُنْدَرٌ ، حَدَّثَنَا شُعْبَةُ ، عَنْ خُبَيْبِ بْنِ عَبْدِ الرَّحْمَنِ ، عَنْ حَفْصِ بْنِ عَاصِمٍ ، عَنْ أَبِي سَعِيدِ بْنِ الْمُعَلَّى ، قَالَ : مَرَّ بِيَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَأَنَا أُصَلِّي ، فَدَعَانِي فَلَمْ آتِهِ حَتَّى صَلَّيْتُ ، ثُمَّ أَتَيْتُ ، فَقَالَ : مَا مَنَعَكَ أَنْ تَأْتِيَنِي ؟ فَقُلْتُ : كُنْتُ أُصَلِّي ، فَقَالَ : أَلَمْ يَقُلِ اللَّهُ : يَأَيُّهَا الَّذِينَ آمَنُوا اسْتَجِيبُوا لِلَّهِ وَلِلرَّسُولِ إِذَا دَعَاكُمْ لِمَا يُحْيِيكُمْ سورة الأنفال آية 24 ، ثُمَّ قَالَ : أَلَا أُعَلِّمُكَ أَعْظَمَ سُورَةٍ فِي الْقُرْآنِ ، قَبْلَ أَنْ أَخْرُجَ مِنَ الْمَسْجِدِ ، فَذَهَبَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لِيَخْرُجَ مِنَ الْمَسْجِدِ ، فَذَكَّرْتُهُ ، فَقَالَ : الْحَمْدُ لِلَّهِ رَبِّ الْعَالَمِينَ سورة الفاتحة آية 2 هِيَ السَّبْعُ الْمَثَانِي وَالْقُرْآنُ الْعَظِيمُ ، الَّذِي أُوتِيتُهُ .

Narrated Abu Sa`id Al-Mualla: While I was praying, the Prophet passed by and called me, but I did not go to him till I had finished my prayer. When I went to him, he said, What prevented you from coming? I said, I was praying. He said, Didn't Allah say O you who believes Give your response to Allah (by obeying Him) and to His Apostle. (8.24) Then he added, Shall I tell you the most superior Sura in the Qur'an before I go out of the mosque? When the Prophet intended to go out (of the Mosque), I reminded him and he said, That is: Al hamdu-li l-lahi Rabbil-`alamin (Surat-al-fatiha)' which is the seven oft repeated verses (Al-Mathani) and the Grand Qur'an which has been given to me.