Hadithcore
Mishkat al-Masabih, 275

Abu Huraira reported God’s messenger as saying, “Seek refuge in God from the pit of sorrow.” On being asked what the pit of sorrow was, he replied, “ It is a <i>wadi</i> in <i>jahannam</i> from which <i>jahannam</i> seeks refuge four hundred times every day.” When God’s messenger was asked who would enter it, he replied, “The Qur’an readers who are ostentatious in what they do.” Tirmidhi transmitted it, and Ibn Majah has the same, adding in it, “Among the Qur’an readers who are most hateful to God are those who visit princes.” Al-Muharibi said that he meant tyrants.

وَعَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «تَعَوَّذُوا بِاللَّهِ مِنْ جُبِّ الْحَزَنِ» قَالُوا: يَا رَسُولَ اللَّهِ وَمَا جُبُّ الْحَزَنِ؟ قَالَ: «وَادٍ فِي جَهَنَّمَ تَتَعَوَّذُ مِنْهُ جَهَنَّم كل يَوْم أَرْبَعمِائَة مرّة» . قُلْنَا: يَا رَسُولَ اللَّهِ وَمَنْ يَدْخُلُهَا قَالَ: «الْقُرَّاءُ الْمُرَاءُونَ بِأَعْمَالِهِمْ» . رَوَاهُ التِّرْمِذِيُّ وَكَذَا ابْنُ مَاجَهْ وَزَادَ فِيهِ: «وَإِنَّ مِنْ أَبْغَضِ الْقُرَّاءِ إِلَى اللَّهِ تَعَالَى الَّذِينَ يَزُورُونَ الْأُمَرَاءَ» . قَالَ الْمُحَارِبِيُّ: يَعْنِي الجورة

References1 variant
In-Book Reference
Book 2, Hadith 71