Mishkat al-Masabih 8 The Excellent Qualities of the Qur’an كتاب فضائل القرآن 41

وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ قَرَأَ (حم) الدُّخَانِ فِي لَيْلَةِ الْجُمْعَةِ غُفِرَ لَهُ» . رَوَاهُ التِّرْمِذِيُّ وَقَالَ: هَذَا حَدِيثٌ غَرِيبٌ وَهِشَام أَبُو الْمِقْدَام الرَّاوِي يضعف

He reported God’s messenger as saying, “If anyone recites Hā’ Mīm ad-Dukhān on a Thursday night his sins will be forgiven.” Tirmidhī transmitted it, saying that this is a gharīb da’īf tradition and that Hishām Abūl Miqdām its transmitter is declared to be weak.