ENOfficial
It was narrated from Salamah bin Nubait that his father performed Hajj and said: “I saw the Prophet (ﷺ) delivering the sermon atop his camel.”
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا وَكِيعٌ، عَنْ سَلَمَةَ بْنِ نُبَيْطٍ، عَنْ أَبِيهِ، أَنَّهُ حَجَّ فَقَالَ رَأَيْتُ النَّبِيَّ ـ صلى الله عليه وسلم ـ يَخْطُبُ عَلَى بَعِيرِهِ .
sunnah.com