Sahih al-Bukhari 4465
صحيح البخاري#4465Sahihحَدَّثَنَا أَبُو نُعَيْمٍ، حَدَّثَنَا شَيْبَانُ، عَنْ يَحْيَى، عَنْ أَبِي سَلَمَةَ، عَنْ عَائِشَةَ، وَابْنِ، عَبَّاسٍ رضى الله عنهم أَنَّ النَّبِيَّ صلى الله عليه وسلم لَبِثَ بِمَكَّةَ عَشْرَ سِنِينَ يُنْزَلُ عَلَيْهِ الْقُرْآنُ، وَبِالْمَدِينَةِ عَشْرًا.
Narrated Aisha and Ibn `Abbas:The Prophet (ﷺ) stayed for ten years in Mecca with the Qur'an being revealed to him and he stayed in Medina for ten years
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:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 64:480