Jami` at-Tirmidhi 2899
جامع الترمذي#2899Sahihحَدَّثَنَا الْعَبَّاسُ بْنُ مُحَمَّدٍ الدُّورِيُّ، قَالَ حَدَّثَنَا خَالِدُ بْنُ مَخْلَدٍ، قَالَ حَدَّثَنَا سُلَيْمَانُ بْنُ بِلاَلٍ، قَالَ حَدَّثَنَا سُهَيْلُ بْنُ أَبِي صَالِحٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم (قُلْ هُوَ اللَّهُ أَحَدٌ ) تَعْدِلُ ثُلُثَ الْقُرْآنِ " . هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ .
Narrated Abu Hurairah:that the Messenger of Allah (ﷺ) said: "Qul Huwa Allahu Ahad is equal to a third of the Qur'an
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:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiIsnaad Hasan
In-book reference: 45:25