Sahih al-Bukhari 4310
صحيح البخاري#4310Sahihوَقَالَ النَّضْرُ أَخْبَرَنَا شُعْبَةُ، أَخْبَرَنَا أَبُو بِشْرٍ، سَمِعْتُ مُجَاهِدًا، قُلْتُ لاِبْنِ عُمَرَ فَقَالَ لاَ هِجْرَةَ الْيَوْمَ، أَوْ بَعْدَ رَسُولِ اللَّهِ صلى الله عليه وسلم مِثْلَهُ.
(In another narration) Ibn `Umar said:"There is no migration today or after Allah's Messenger (ﷺ)." (and completed his statement as above)
Scholarly Authentication
The label above is the grade most of these scholars gave, each scholar counted once — 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. When they judged only its chain of narrators (“Isnaad”), the label says “Sound chain”. 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: 64:341