We offered a four Rak'at prayer at Mina behind Uthman bin ' Affan 'Abdullah bin Mas'ud was informed about it. He said sadly, "Truly to Allâh we belong and truly to Him we shall return. And added, "I prayed two Rak'at with Allâh's Messenger (ﷺ) at Mina and similarly with Abu Bakr and with 'Umar (during their caliphates)." He further said, "May I be lucky enough to have two of the four Rak'at accepted (by Allâh)." [2:190-O.B]