Abd al-Rahman bin Yazid (may Allah have mercy on him) says: Uthman bin Affan (may Allah be pleased with him) led us in four rak'ahs at Mina. This was mentioned to Abdullah bin Mas'ud (may Allah be pleased with him), and he recited 'Inna lillahi wa inna ilayhi raji'un' (Indeed, we belong to Allah and to Him we shall return), and said: I prayed two rak'ahs at Mina with the Prophet (peace and blessings be upon him), and also two rak'ahs at Mina with Abu Bakr and Umar (may Allah be pleased with them both). Would that, of the four rak'ahs, my share were two accepted rak'ahs.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5433