Sayyiduna Abdullah bin Mas’ud (may Allah be pleased with him) says: I went to Sayyiduna Abu Musa Ash’ari (may Allah be pleased with him) at his house. Meanwhile, the time for prayer arrived. He said to me: Abu Abdur Rahman! Step forward (and lead the prayer) because you are older and more knowledgeable. But I said: No, rather you should step forward, because we have come to you, to your house, and to your mosque, so you are more deserving. Thus, Sayyiduna Abu Musa (may Allah be pleased with him) stepped forward and he took off his shoes. When he finished the prayer with salam, I said: Why did you take off your shoes? Are you in the sacred valley? I saw the Messenger of Allah (peace and blessings be upon him) praying while wearing socks and shoes.