The Book of Pilgrimage
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، وَإِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالاَ أَخْبَرَنَا وَكِيعٌ، عَنْ مُسَاوِرٍ، الْوَرَّاقِ عَنْ جَعْفَرِ بْنِ عَمْرِو بْنِ حُرَيْثٍ، عَنْ أَبِيهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم خَطَبَ النَّاسَ وَعَلَيْهِ عِمَامَةٌ سَوْدَاءُ .Amr b. Huraith reported on the authority of his father that Allah's Messenger (ﷺ) addressed the people (on the day of the Victory of Mecca) with a black turban on his head
From Sahih Muslim, whose reports the scholars accept as authentic.