Sahih al-Bukhari 4307
صحيح البخاري#4307Sahihحَدَّثَنَا مُحَمَّدُ بْنُ أَبِي بَكْرٍ، حَدَّثَنَا الْفُضَيْلُ بْنُ سُلَيْمَانَ، حَدَّثَنَا عَاصِمٌ، عَنْ أَبِي عُثْمَانَ النَّهْدِيِّ، عَنْ مُجَاشِعِ بْنِ مَسْعُودٍ، انْطَلَقْتُ بِأَبِي مَعْبَدٍ إِلَى النَّبِيِّ صلى الله عليه وسلم لِيُبَايِعَهُ عَلَى الْهِجْرَةِ، قَالَ " مَضَتِ الْهِجْرَةُ لأَهْلِهَا، أُبَايِعُهُ عَلَى الإِسْلاَمِ وَالْجِهَادِ." فَلَقِيتُ أَبَا مَعْبَدٍ فَسَأَلْتُهُ فَقَالَ صَدَقَ مُجَاشِعٌ. وَقَالَ خَالِدٌ عَنْ أَبِي عُثْمَانَ عَنْ مُجَاشِعٍ أَنَّهُ جَاءَ بِأَخِيهِ مُجَالِدٍ.
Narrated Mujashi bin Masud:I took Abu Mabad to the Prophet (ﷺ) in order that he might give him the pledge of allegiance for migration. The Prophet (ﷺ) said, "Migration has gone to its people, but I take the pledge from him (i.e. Abu Mabad) for Islam and Jihad
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.