Jami` at-Tirmidhi 3478
جامع الترمذي#3478Hasanحَدَّثَنَا عَلِيُّ بْنُ خَشْرَمٍ، حَدَّثَنَا عِيسَى بْنُ يُونُسَ، عَنْ عُبَيْدِ اللَّهِ بْنِ أَبِي زِيَادٍ الْقَدَّاحِ، كَذَا قَالَ عَنْ شَهْرِ بْنِ حَوْشَبٍ، عَنْ أَسْمَاءَ بِنْتِ يَزِيدَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " اسْمُ اللَّهِ الأَعْظَمُ فِي هَاتَيْنِ الآيَتَيْنِِ : ( وإلَهُكُمْ إِلَهٌ وَاحِدٌ لاَ إِلَهَ إِلاَّ هُوَ الرَّحْمَنُ الرَّحِيمُ ) وَفَاتِحَةِ آلِ عِمْرَانَ (الم * اللَّهُ لاَ إِلَهَ إِلاَّ هُوَ الْحَىُّ الْقَيُّومُ ) " . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ .
Asma bint Yazid narrated that the Prophet (ﷺ) said:“Allah's greatest name is in these two Ayah: ‘And your deity is One deity, there is none who has the right to be worshipped but He, Ar-Raḥmān, Ar-Raḥīm.’ And the Opening of Al-`Imrān: ‘Alif. Lām. Mīm. Allah, None has the right to be worshipped but He, the Ever living, the Sustainer.’”
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: 48:109