It is narrated from Hazrat Nabi T (may Allah be pleased with him) that "those who performed Hajj with the Noble Prophet (peace and blessings be upon him)" that I saw the Noble Prophet (peace and blessings be upon him) delivering a sermon on the Day of Arafah while sitting on his camel.
Hadith Referenceمسند احمد / تتمہ مُسْنَدِ الْكُوفِيِّينَ / 18721
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد ضعيف لاضطرابه