I passed by Hisham bin Hakeem bin Hizam when he was reciting Sooratal-Furqan during the lifetime of the Messenger of Allah ﷺ, I listened to his recitation and he was reciting in a manner different from the way in which the Messenger of Allah ﷺ had taught me to recite it. I was about to interrupt him whilst he was praying, but I waited until he finished his prayer, and then I tied his garment around his neck. I said to him: Who taught you this soorah that you are reciting? He said: The Messenger of Allah ﷺ taught it to me. I said to him: You are lying by Allah! He taught me this soorah that you recited. I brought him to the Messenger of Allah ﷺ and said, ʿO Messenger of Allah ﷺ, I heard this man reciting Sooratal-Furqan in a way different to the way you taught it to me, and you taught me Sooratal-Furqan, The Prophet ﷺ said: Let him go, O ʿUmar: Recite it, O Hisham. So he recited it to him as I had heard him recite it. The Messenger of Allah ﷺ said, ʿThus it was revealed.ʿ Then he said to me, ʿRecite it,” so I recited it and he said, “Thus it was revealed.ʿ Then the Messenger of Allah ﷺ is said: ʿThis Qurʿan has been revealed in seven different ways, so recite it in the way that is easiest for you.” It was narrated from al Miswar bin Makhramah and ʿAbdur-Rahman bin Abdul-Qari that they heard Umar bin al Khattab say: I passed by Hisham bin Hakeem bin Hizam when he was reciting Sooratal-Furqan during the lifetime of the Messenger of Allah ﷺ. I listened to his recitation and he was reciting in a way different from the way in which the Messenger of Allah ﷺ had taught me to recite it. I was about to interrupt him whilst he was praying, but I waited until he said the tasleem, and when he had said the tasleem,... and he narrated a similar report. (Using translation from Aḥmad 296)
مَرَرْتُ بِهِشَامِ بْنِ حَكِيمِ بْنِ حِزَامٍ يَقْرَأُ سُورَةَ الْفُرْقَانِ فِي حَيَاةِ رَسُولِ اللهِ ﷺ فَاسْتَمَعْتُ قِرَاءَتَهُ فَإِذَا هُوَ يَقْرَأُ عَلَى حُرُوفٍ كَثِيرَةٍ لَمْ يُقْرِئْنِيهَا رَسُولُ اللهِ ﷺ فَكِدْتُ أَنْ أُسَاوِرَهُ فِي الصَّلَاةِ فَانْتَظَرْتُ حَتَّى سَلَّمَ فَلَمَّا سَلَّمَ لَبَبْتُهُ بِرِدَائِهِ فَقُلْتُ مَنْ أَقْرَأَكَ هَذِهِ السُّورَةَ الَّتِي أَسْمَعُكَ تَقْرَؤُهَا؟ قَالَ أَقْرَأَنِيهَا رَسُولُ اللهِ ﷺ قَالَ قُلْتُ لَهُ كَذَبْتَ وَاللهِ إِنَّ رَسُولَ اللهِ ﷺ لَهُوَ أَقْرَأَنِي هَذِهِ السُّورَةَ الَّتِي تَقْرَؤُهَا فَانْطَلَقْتُ أَقُودُهُ إِلَى رَسُولِ اللهِ ﷺ فَقُلْتُ يَا رَسُولَ اللهِ إِنِّي سَمِعْتُ هَذَا يَقْرَأُ سُورَةَ الْفُرْقَانِ عَلَى حُرُوفٍ لَمْ تُقْرِئْنِيهَا وَأَنْتَ أَقْرَأْتَنِي سُورَةَ الْفُرْقَانِ فَقَالَ النَّبِيُّ ﷺ أَرْسِلْهُ يَا عُمَرُ اقْرَأْهَا يَا هِشَامُ فَقَرَأَ عَلَيْهِ الْقِرَاءَةَ الَّتِي سَمِعْتُ فَقَالَ النَّبِيُّ ﷺ هَكَذَا أُنْزِلَتْ ثُمَّ قَالَ النَّبِيُّ ﷺ اقْرَأْ يَا عُمَرُ فَقَرَأْتُ الْقِرَاءَةَ الَّتِي أَقْرَأَنِي النَّبِيُّ ﷺ فَقَالَ النَّبِيُّ ﷺ هَكَذَا أُنْزِلَتْ ثُمَّ قَالَ رَسُولُ اللهِ ﷺ إِنَّ الْقُرْآنَ أُنْزَلَ عَلَى سَبْعَةِ أَحْرُفٍ فَاقْرَءُوا مِنْهُ مَا تَيَسَّرَ