كتاب العلم
47  
The Book of Knowledge
(1)
Chapter: The Prohibition Of, And Warning Against Seeking Out Verses Of The Quran Whose Meanings Are Not Decisive; The Prohibition Of Arguing About The Qur'an
(1)
بَاب النَّهْيِ عَنْ اتِّبَاعِ مُتَشَابِهِ الْقُرْآنِ وَالتَّحْذِيرِ مِنْ مُتَّبِعِيهِ وَالنَّهْيِ عَنْ الِاخْتِلَافِ فِي الْقُرْآنِ
Sahih Muslim 2667 a

Jundub b. 'Abdullah al-Bajali reported Allah's Messenger (ﷺ) as saying:

Recite the Qur'an as long as your hearts agree to do so, and when you feel variance between them (between your hearts and tongues), then get up (and leave its recital for the time being).
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا أَبُو قُدَامَةَ الْحَارِثُ بْنُ عُبَيْدٍ، عَنْ أَبِي عِمْرَانَ، عَنْ جُنْدُبِ بْنِ عَبْدِ اللَّهِ الْبَجَلِيِّ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ اقْرَءُوا الْقُرْآنَ مَا ائْتَلَفَتْ عَلَيْهِ قُلُوبُكُمْ فَإِذَا اخْتَلَفْتُمْ فِيهِ فَقُومُوا ‏"‏ ‏.‏
Reference : Sahih Muslim 2667a
In-book reference : Book 47, Hadith 3
USC-MSA web (English) reference : Book 34, Hadith 6444
  (deprecated numbering scheme)