عَنْ أَبِي سَعِيدِ بْنِ الْمُعَلَّى رَضِيَ اللَّهُ عَنْهُ قَالَ كُنْتُ أُصَلِّي فَمَرَّ بِي رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فَدَعَانِي فَلَمْ آتِهِ حَتَّى صَلَّيْتُ ثُمَّ أَتَيْتُهُ فَقَالَ مَا مَنَعَكَ أَنْ تَأْتِيَنِي فَقَالَ إِنِّي كُنْتُ أُصَلِّي قَالَ أَلَمْ يَقُلِ اللَّهُ تَبَارَكَ وَتَعَالَى يَا أَيُّهَا الَّذِينَ آمَنُوا اسْتَجِيبُوا لِلَّهِ وَلِلرَّسُولِ إِذَا دَعَاكُمْ لِمَا يُحْيِيكُمْ ثُمَّ قَالَ أَلَا أُعَلِّمُكُمْ أَعْظَمَ سُورَةٍ فِي الْقُرْآنِ قَبْلَ أَنْ أَخْرُجَ مِنَ الْمَسْجِدِ قَالَ فَذَهَبَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ لِيَخْرُجَ فَذَكَّرْتُهُ فَقَالَ الْحَمْدُ لِلَّهِ رَبِّ الْعَالَمِينَ هِيَ السَّبْعُ الْمَثَانِي وَالْقُرْآنُ الْعَظِيمُ الَّذِي أُوتِيتُهُ
It is narrated from Sayyiduna Abu Sa'id bin Mu'alla (may Allah be pleased with him), he says: I was performing prayer when the Noble Prophet (peace and blessings be upon him) passed by me and called me, but I could not come until I completed my prayer and then presented myself before him. The Prophet (peace and blessings be upon him) said: What prevented you from coming to me? I said: O Messenger of Allah, I was performing prayer. The Prophet (peace and blessings be upon him) said: Did Allah Almighty not say: {یَا أَ یُّہَا الَّذِینَ آمَنُوْا اسْتَجِیبُوا لِلّٰہِ وَلِلرَّسُولِ إِذَا دَعَاکُمْ لِمَا یُحْیِیکُمْ} … O you who believe, respond to Allah and to the Messenger when he calls you to that which gives you life? Then the Prophet (peace and blessings be upon him) said: Shall I not teach you the greatest Surah of the Qur'an before you leave the mosque? Then when the Prophet (peace and blessings be upon him) was about to leave the mosque, I reminded him. The Prophet (peace and blessings be upon him) said: It is Surah Al-Fatiha; these are the seven verses and the Great Qur'an which I have been given.