[Machine] The Messenger of Allah ﷺ used to lead the people in prayer and a man would recite behind him. When the Messenger of Allah ﷺ finished, he asked, "Who is the one who recited my Sura?" He forbade reading behind the Imam. Ibn Saad reported that some people were astonished and said that Hajjaj had a unique version of his narration.
كَانَ رَسُولُ اللهِ ﷺ يُصَلِّي بِالنَّاسِ وَرَجُلٌ يَقْرَأُ خَلْفَهُ فَلَمَّا فَرَغَ قَالَ مَنْ ذَا الَّذِي يُخَالِجُنِي سُورَتِي؟ فَنَهَى عَنِ الْقِرَاءَةِ خَلْفَ الْإِمَامِ قَالَ ابْنُ صَاعِدٍ قَوْلَهُ فَنَهَى عَنِ الْقِرَاءَةِ خَلْفَ الْإِمَامِ تَفَرَّدَ بِرِوَايَتِهِ حَجَّاجٌ وَقَدْ