Abdullah bin Sidan (may Allah have mercy on him) narrates: I was with Sayyiduna Ibn Mas'ud (may Allah be pleased with him) at Arafah, and Sayyiduna Uthman (may Allah be pleased with him) led four rak'ahs of Zuhr and four rak'ahs of Asr. At this Sayyiduna Ibn Mas'ud (may Allah be pleased with him) said: "In this very place I prayed with the Messenger of Allah (peace and blessings be upon him), and with Sayyiduna Abu Bakr and Sayyiduna Umar (may Allah be pleased with them both), and all of them led only two rak'ahs (shortening the prayer)." I said: "Will you not go and stand up to him (to object)?" He said: "Be quiet, for disagreement is evil."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Abdullah bin Sidan except Maymun bin Mihran (may Allah have mercy on him), and Ja'far bin Burqan (may Allah have mercy on him) is alone in narrating it from him."