Sunan an-Nasa'i 5344
سنن النسائي#5344Sahihأَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا مُعَاوِيَةُ بْنُ عَمَّارٍ، قَالَ حَدَّثَنَا أَبُو الزُّبَيْرِ، عَنْ جَابِرٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم دَخَلَ يَوْمَ فَتْحِ مَكَّةَ وَعَلَيْهِ عِمَامَةٌ سَوْدَاءُ بِغَيْرِ إِحْرَامٍ .
It was narrated from Jabir that:On the Day of the Conquest of Makkah, the Messenger of Allah [SAW] entered (the city) wearing a black turban, and he was not in Ihram
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 ZaiHasan
In-book reference: 48:305