[Machine] The Messenger of Allah ﷺ used to recite in the first two raka'ahs of Dhuhr and Asr the Opening Chapter of the Book and two surahs, and in the last two raka'ahs, he would recite the Mother of the Book and we would hear him recite a verse. He would prolong the first raka'ah more than the second raka'ah.  

أَنَّ رَسُولَ اللهِ ﷺ كَانَ يَقْرَأُ فِي الرَّكْعَتَيْنِ الْأُولَيَيْنِ مِنَ الظُّهْرِ وَالْعَصْرِ بِفَاتِحَةِ الْكِتَابِ وَسُورَتَيْنِ وَفِي الرَّكْعَتَيْنِ الْأُخْرَيَيْنِ بِأُمِّ الْكِتَابِ وَيُسْمِعُنَا الْآيَةَ وَيُطَوِّلُ فِي الرَّكْعَةِ الْأُولَى مَا لَا يُطِيلُ فِي الرَّكْعَةِ الثَّانِيَةِ  

[Machine] Prayer is not valid without the opening chapter of the book, neither more nor less. We have been informed about this by Ali ibn Abi Talib, Abdullah ibn Masood, and Aisha.  

صَلَاةَ إِلَّا بِفَاتِحَةِ الْكِتَابِ فَمَا فَوْقَ ذَاكَ أَوْ قَالَ مَا أَكْثَرُ مِنْ ذَاكَ وَرُوِّينَا مَا دَلَّ عَلَى هَذَا عَنْ عَلِيِّ بْنِ أَبِي طَالِبٍ وَعَبْدِ اللهِ بْنِ مَسْعُودٍ وَعَائِشَةَ ؓ