حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ عُرْوَةَ بْنِ الزُّبَيْرِ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ عَبْدٍ الْقَارِيِّ، أَنَّهُ قَالَ سَمِعْتُ عُمَرَ بْنَ الْخَطَّابِ، يَقُولُ سَمِعْتُ هِشَامَ بْنَ حَكِيمِ بْنِ حِزَامٍ، يَقْرَأُ سُورَةَ الْفُرْقَانِ عَلَى غَيْرِ مَا أَقْرَؤُهَا وَكَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم أَقْرَأَنِيهَا فَكِدْتُ أَنْ أَعْجَلَ عَلَيْهِ ثُمَّ أَمْهَلْتُهُ حَتَّى انْصَرَفَ ثُمَّ لَبَّبْتُهُ بِرِدَائِهِ فَجِئْتُ بِهِ رَسُولَ اللَّهِ صلى الله عليه وسلم فَقُلْتُ يَا رَسُولَ اللَّهِ إِنِّي سَمِعْتُ هَذَا يَقْرَأُ سُورَةَ الْفُرْقَانِ عَلَى غَيْرِ مَا أَقْرَأْتَنِيهَا فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ أَرْسِلْهُ - ثُمَّ قَالَ - اقْرَأْ يَا هِشَامُ ‏"‏ ‏.‏ فَقَرَأَ الْقِرَاءَةَ الَّتِي سَمِعْتُهُ يَقْرَأُ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ هَكَذَا أُنْزِلَتْ ‏"‏ ‏.‏ ثُمَّ قَالَ لِي ‏"‏ اقْرَأْ ‏"‏ ‏.‏ فَقَرَأْتُهَا فَقَالَ ‏"‏ هَكَذَا أُنْزِلَتْ إِنَّ هَذَا الْقُرْآنَ أُنْزِلَ عَلَى سَبْعَةِ أَحْرُفٍ فَاقْرَءُوا مَا تَيَسَّرَ مِنْهُ ‏"‏ ‏.‏

Yahya related to me from Malik from Ibn Shihab from Urwa ibn az-Zubayr that Abd ar-Rahman ibn Abd al-Qari said that he had heard Umaribn al-Khattab say, "I heard Hisham ibn Hakim ibn Hizam reciting Suratal-Furqan (Sura 25) differently from me, and it was the Messenger ofAllah, may Allah bless him and grant him peace, who had recited it tome. I was about to rush up to him but I granted him a respite until hehad finished his prayer. Then I grabbed him by his cloak and took himto the Messenger of Allah, may Allah bless him and grant him peace,and said, 'Messenger of Allah, I heard this man reciting Surat al-Furqan differently from the way you recited it to me.' The Messengerof Allah, may Allah bless him and grant him peace, said, 'Let him go.'Then he said, 'Recite, Hisham,' and Hisham recited as I had heard himrecite. The Messenger of Allah, may Allah bless him and grant himpeace, said, 'It was sent down like that.' Then he said to me,'Recite' and I recited the sura, and he said, 'It was sent down likethat. This Qur'an was sent down in seven (different) ways, so recitefrom it whatever is easy for you .' " Translation Not Available

Book reference: Muwatta Imam Malik Book 15 Hadith 477
Web reference: Muwatta Imam Malik Book 15 Hadith 5