Sahih al-Bukhari 7550

Al-Miswar ibn Makhrama and 'Abdu'r-Rahman ibn Abdu'l-Qari related that they heard 'Umar ibn al-Khattab say, "I heard Hisham ibn Hakim reciting Surat al-Furqan while the Prophet, may Allah bless him and grant him peace, was alive. I listened to his recitation and he was reciting it in several modes which the Messenger of Allah, may Allah bless him and grant him peace, had not recited. I almost grabbed him in the prayer, but I waited until he said the salam. Then I grabbed by his cloak and demanded, 'Who recited to you this sura which I heard you reciting?' He answered, 'The Messenger of Allah, may Allah bless him and grant him peace, recited it to me.' I said, 'You lied! The Messenger of Allah, recited it to me differently to how you recited it!' So I led him off to the Messenger of Allah, may Allah bless him and grant him peace, and said, 'I heard this one reciting Surat al-Furqan in a different way to how you recited it to me!' The Messenger of Allah, may Allah bless him and grant him peace, said, 'Release him. Recite, Hisham.' So he recited it to him in the way which I had heard him reciting.' The Messenger of Allah, may Allah bless him and grant him peace, said, 'That is how it was revealed.' Then he said, 'Recite, Umar,' and I recited it in the recitation he had taught me. The Messenger of Allah, may Allah bless him and grant him peace, said, 'That is how it was revealed. This Qur'an was revealed in seven modes, so recite whatever you find easy of it.'"