This hadith has been narrated on the authority of 'Amr b. Dinar with the same chain of transmitters, but none of them (the narrators) made a mention that he (the Holy Prophet) was delivering address at 'Arafat except Shu'ba.
عَنْ عَمْرِو بْنِ دِينَارٍ بِهَذَا الإِسْنَادِ وَلَمْ يَذْكُرْ أَحَدٌ مِنْهُمْ يَخْطُبُ بِعَرَفَاتٍ غَيْرُ شُعْبَةَ وَحْدَهُ