[Machine] The Messenger of Allah ﷺ said, "Debating about the Quran is disbelief." This is a narration from al-Mu'tamir from Muhammad ibn Amr, authentic according to the conditions of Muslim, but they did not include it. As for Umar ibn Abi Salamah, they did not use it as evidence.
أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ «الْجِدَالُ فِي الْقُرْآنِ كُفْرٌ» حَدِيثُ الْمُعْتَمِرِ عَنْ مُحَمَّدِ بْنِ عَمْرٍو صَحِيحٌ عَلَى شَرْطِ مُسْلِمٍ وَلَمْ يُخَرِّجَاهُ فَأَمَّا عُمَرُ بْنُ أَبِي سَلَمَةَ فَإِنَّهُمَا لَمْ يَحْتَجَّا بِهِ