The Messenger of Allah ﷺ said, "Disputing about the Quran is disbelief."
حدثنا حماد بن أسامة حدثني محمد بن عمرو الليثي حدثنا أبو سلمة
قال رسول الله ﷺ مراء في القرآن كفر
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Its isnad is sahih, and it is a repeat of 7499. We have already presented it and noted this there.