Sunan an-Nasa'i 3258
سنن النسائي#3258Sahihأَخْبَرَنَا مُحَمَّدُ بْنُ الْعَلاَءِ، وَأَحْمَدُ بْنُ حَرْبٍ، قَالاَ حَدَّثَنَا أَبُو مُعَاوِيَةَ، عَنِ الأَعْمَشِ، عَنْ إِبْرَاهِيمَ، عَنِ الأَسْوَدِ، عَنْ عَائِشَةَ، تَزَوَّجَهَا رَسُولُ اللَّهِ صلى الله عليه وسلم وَهِيَ بِنْتُ تِسْعٍ وَمَاتَ عَنْهَا وَهِيَ بِنْتُ ثَمَانِيَ عَشْرَةَ .
It was narrated from 'Aishah that the Messenger of Allah married her when she was nine and he died when she was eighteen years old
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:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 26:63