Sunan an-Nasa'i, Volume 3, Book 24, Hadith 2872 (DarusSalam) ⓘ
It was narrated from Jabir bin Abdulla that the Prophet entered on the day of the Conquest of Makkah wearing a back Imamah, without being in Ihram.
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا مُعَاوِيَةُ بْنُ عَمَّارٍ، قَالَ حَدَّثَنِي أَبُو الزُّبَيْرِ الْمَكِّيُّ، عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ، أَنَّ النَّبِيَّ صلى الله عليه وسلم دَخَلَ يَوْمَ فَتْحِ مَكَّةَ وَعَلَيْهِ عِمَامَةٌ سَوْدَاءُ بِغَيْرِ إِحْرَامٍ .
also referenced under: Hadith 2869 (Reference) & Book 24, Hadith 0 (In-Book)