حَدَّثَنَا الْقَعْنَبِيُّ، عَنْ مَالِكٍ، عَنِ الْعَلاَءِ بْنِ عَبْدِ الرَّحْمَنِ، أَنَّهُ سَمِعَ أَبَا السَّائِبِ، مَوْلَى هِشَامِ بْنِ زُهْرَةَ يَقُولُ سَمِعْتُ أَبَا هُرَيْرَةَ، يَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏مَنْ صَلَّى صَلاَةً لَمْ يَقْرَأْ فِيهَا بِأُمِّ الْقُرْآنِ فَهِيَ خِدَاجٌ فَهِيَ خِدَاجٌ فَهِيَ خِدَاجٌ غَيْرُ تَمَامٍ ‏"قَالَ فَقُلْتُ يَا أَبَا هُرَيْرَةَ إِنِّي أَكُونُ أَحْيَانًا وَرَاءَ الإِمَامِ ‏.‏ قَالَ فَغَمَزَ ذِرَاعِي وَقَالَ اقْرَأْ بِهَا يَا فَارِسِيُّ فِي نَفْسِكَ فَإِنِّي سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ ‏"‏ قَالَ اللَّهُ تَعَالَىقَسَمْتُ الصَّلاَةَ بَيْنِي وَبَيْنَ عَبْدِي نِصْفَيْنِ فَنِصْفُهَا لِي وَنِصْفُهَا لِعَبْدِي وَلِعَبْدِي مَا سَأَلَ ‏"‏ ‏.‏ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ اقْرَءُوا يَقُولُ الْعَبْدُ ‏‏{‏ الْحَمْدُ لِلَّهِ رَبِّ الْعَالَمِينَ ‏}‏ يَقُولُ اللَّهُ عَزَّ وَجَلَّ حَمِدَنِي عَبْدِي يَقُولُ الْعَبْدُ ‏‏{‏ الرَّحْمَنِ الرَّحِيمِ ‏}‏ يَقُولُ اللَّهُ عَزَّ وَجَلَّ أَثْنَى عَلَىَّ عَبْدِي يَقُولُ الْعَبْدُ ‏‏{‏ مَالِكِ يَوْمِ الدِّينِ ‏}‏ يَقُولُ اللَّهُ عَزَّ وَجَلَّ مَجَّدَنِي عَبْدِي يَقُولُ الْعَبْدُ ‏‏{‏ إِيَّاكَ نَعْبُدُ وَإِيَّاكَ نَسْتَعِينُ ‏}‏ يَقُولُ اللَّهُ وَهَذِهِ بَيْنِي وَبَيْنَ عَبْدِي وَلِعَبْدِي مَا سَأَلَ يَقُولُ الْعَبْدُ ‏‏{‏ اهْدِنَا الصِّرَاطَ الْمُسْتَقِيمَ * صِرَاطَ الَّذِينَ أَنْعَمْتَ عَلَيْهِمْ غَيْرِ الْمَغْضُوبِ عَلَيْهِمْ وَلاَ الضَّالِّينَ ‏}‏ يَقُولُ اللَّهُ فَهَؤُلاَءِ لِعَبْدِي وَلِعَبْدِي مَا سَأَلَ ‏"
Translation
Abu Hurairah reported the Messenger of Allah (May peace be upon him) as saying

"Whoever performs a prayer in which he does not recite Umm al-Qur'an, it is deficient, it is deficient, it is deficient, incomplete." He said: I said, "O Abu Hurairah, at times I am behind the imam." He pinched my upper arm and said, "Recite it quietly to yourself, O Persian, for I heard the Messenger of Allah (ﷺ) say: 'Allah, the Exalted, said: "I have divided the prayer between Myself and My servant into two halves, and My servant shall have what he asks for."' The Messenger of Allah (ﷺ) said: "Recite." When the servant says:

{ All praise is due to Allah, the Lord of the worlds }
Allah, the Mighty and Sublime, says: "My servant has praised Me." When the servant says:
{ The Compassionate, the Merciful }
Allah, the Mighty and Sublime, says: "My servant has extolled Me." When the servant says:
{ Master of the Day of Judgment }
Allah, the Mighty and Sublime, says: "My servant has glorified Me." When the servant says:
{ You alone do we worship, and You alone do we ask for help }
Allah says: "This is between Me and My servant, and My servant shall have what he asks for." When the servant says:
{ Guide us to the straight path * the path of those whom You have favored, not of those who have evoked [Your] anger, nor of those who have gone astray }
Allah says: "These are for My servant, and My servant shall have what he asks for."