Jami` at-Tirmidhi 2893
جامع الترمذي#2893Hasan(حَدَّثَنَا مُحَمَّدُ بْنُ مُوسَى الْحَرَشِيُّ الْبَصْرِيُّ، قَالَ حَدَّثَنَا الْحَسَنُ بْنُ سَلْمِ بْنِ صَالِحٍ الْعِجْلِيُّ، قَالَ حَدَّثَنَا ثَابِتٌ الْبُنَانِيُّ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنْ قَرَأَ إِذَا زُلْزِلَتِ عُدِلَتْ لَهُ بِنِصْفِ الْقُرْآنِ وَمَنْ قَرَأَْ قُلْ يَا أَيُّهَا الْكَافِرُونَ ) عُدِلَتْ لَهُ بِرُبْعِ الْقُرْآنِ وَمَنْ قَرَأَْ قُلْ هُوَ اللَّهُ أَحَدٌ ) عُدِلَتْ لَهُ بِثُلُثِ الْقُرْآنِ " . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ غَرِيبٌ لاَ نَعْرِفُهُ إِلاَّ مِنْ حَدِيثِ هَذَا الشَّيْخِ الْحَسَنِ بْنِ سَلْمٍ . وَفِي الْبَابِ عَنِ ابْنِ عَبَّاسٍ .
Narrated Anas bin Malik:that the Messenger of Allah (ﷺ) said: "Whoever recites Idha Zulzilat, it equals half of the Qur'an for him. Whoever recites: Qul Ya Ayyuhal-Kafirun it equals a fourth of the Qur'an for him. And whoever recites: Qul Huwa Allahu Ahad it equals a third of the Qur'an for him
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 45:19