Umar bin Al-Khattab, may Allah be pleased with him, said: "I heard Hisham bin Hakim bin Hizam reciting: Surat Al-Furqan, in a way that the Prophet of Allah ﷺ had not taught me. I said: 'Who taught you this Surah?' He said: 'The Messenger of Allah ﷺ.' I said: 'You are lying; the Messenger of Allah ﷺ did not teach you like that. 'I took him by the hand and brought him to the Messenger of Allah ﷺ and said: 'O Messenger of Allah, you taught me Surat Al-Furqan, but I heard this man reciting it in a way that you did not teach me.' The Messenger of Allah ﷺ said: 'Recite, O Hisham.' So he recited it as he had recited it (before). The Messenger of Allah ﷺ said: 'It was revealed like this.' Then he said: 'Recite, O Umar.' So I recited it, and he said: 'It was revealed like this.' Then the Messenger of Allah ﷺ said: 'The Quran was revealed to be recited in seven different modes.'"
سَمِعْتُ هِشَامَ بْنَ حَكِيمِ بْنِ حِزَامٍ يَقْرَأُ سُورَةَ الْفُرْقَانِ فَقَرَأَ فِيهَا حُرُوفًا لَمْ يَكُنْ نَبِيُّ اللَّهِ ﷺ أَقْرَأَنِيهَا قُلْتُ مَنْ أَقْرَأَكَ هَذِهِ السُّورَةَ قَالَ رَسُولُ اللَّهِ ﷺ قُلْتُ كَذَبْتَ مَا هَكَذَا أَقْرَأَكَ رَسُولُ اللَّهِ ﷺ فَأَخَذْتُ بِيَدِهِ أَقُودُهُ إِلَى رَسُولِ اللَّهِ ﷺ فَقُلْتُ يَا رَسُولَ اللَّهِ إِنَّكَ أَقْرَأْتَنِي سُورَةَ الْفُرْقَانِ وَإِنِّي سَمِعْتُ هَذَا يَقْرَأُ فِيهَا حُرُوفًا لَمْ تَكُنْ أَقْرَأْتَنِيهَا فَقَالَ رَسُولُ اللَّهِ ﷺ اقْرَأْ يَا هِشَامُ فَقَرَأَ كَمَا كَانَ يَقْرَأُ فَقَالَ رَسُولُ اللَّهِ ﷺ هَكَذَا أُنْزِلَتْ ثُمَّ قَالَ اقْرَأْ يَا عُمَرُ فَقَرَأْتُ فَقَالَ هَكَذَا أُنْزِلَتْ ثُمَّ قَالَ رَسُولُ اللَّهِ ﷺ إِنَّ الْقُرْآنَ أُنْزِلَ عَلَى سَبْعَةِ أَحْرُفٍ