Sayyiduna Uthman (may Allah be pleased with him) prayed four rak'ahs at Mina, so Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: I prayed with the Prophet (peace and blessings be upon him), and two rak'ahs with Sayyiduna Abu Bakr (may Allah be pleased with him), and two rak'ahs with Sayyiduna Umar (may Allah be pleased with him). Then your paths diverged. I wish that, in place of four rak'ahs, I had two accepted rak'ahs.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10105