[Machine] The Messenger of Allah ﷺ said, "The Quran was revealed with seven dialects."  

قَالَ رَسُولُ اللهِ ﷺ أُنْزِلَ الْقُرْآنُ عَلَى سَبْعَةِ أَحْرُفٍ  

[Machine] The Prophet ﷺ read a verse to me and I read it back to him differently from how Ubay ibn Ka'b recited it. So I asked him, "Who recited it to you?" He said, "The Prophet ﷺ recited it to me." I said, "By Allah, I recited it to you this way and that way." Ubay said, "I do not have in my heart any Islam that I had that day." So I went to the Prophet ﷺ and said, "O Messenger of Allah, did you not recite this verse to me like this and that?" He said, "Yes." I said, "But he claims that I recited it to him like this and that." He struck his hand on my chest and it went away. Then I did not find anything from him afterwards. Then the Prophet ﷺ said, "Jibreel and Mika'il came to me and Jibreel said, 'Recite the Qur'an precisely.' Mika'il said, 'Increase it for him.' He said, 'Recite it with two letters,' and he said, 'Increase it for him until it reached seven letters.' He said, 'Every letter is a reward.'"  

أَقْرَأَنِي رَسُولُ اللهِ ﷺ آيَةً وَأَقْرَأَهَا آخَرَ غَيْرَ قِرَاءَةِ أُبَيٍّ فَقُلْتُ مَنْ أَقْرَأَكَهَا؟ قَالَ أَقْرَأَنِيهَا رَسُولُ اللهِ ﷺ قُلْتُ وَاللهِ لَقَدْ أَقْرَأَنِيهَا كَذَا وَكَذَا قَالَ أُبَيٌّ فَمَا تَخَلَّجَ فِي نَفْسِي مِنَ الْإِسْلَامِ مَا تَخَلَّجَ يَوْمَئِذٍ فَأَتَيْتُ النَّبِيَّ ﷺ قُلْتُ يَا رَسُولَ اللهِ أَلَمْ تُقْرِئْنِي آيَةَ كَذَا وَكَذَا؟ قَالَ بَلَى قَالَ فَإِنَّ هَذَا يَدَّعِي أَنَّكَ أَقْرَأْتَهُ كَذَا وَكَذَا فَضَرَبَ بِيَدِهِ فِي صَدْرِي فَذَهَبَ ذَاكَ فَمَا وَجَدْتُ مِنْهُ شَيْئًا بَعْدُ ثُمَّ قَالَ رَسُولُ اللهِ ﷺ أَتَانِي جِبْرِيلُ وَمِيكَائِيلُ فَقَالَ جِبْرِيلُ اقْرَأِ الْقُرْآنَ عَلَى حَرْفٍ فَقَالَ مِيكَائِيلُ اسْتَزِدْهُ قَالَ اقْرَأْهُ عَلَى حَرْفَيْنِ قَالَ اسْتَزِدْهُ حَتَّى بَلَغَ سَبْعَةَ أَحْرُفٍ قَالَ كُلٌّ شَافٍ كَافٍ