Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with both of them) narrates: On the day of sacrifice, the Prophet Muhammad (peace and blessings be upon him) stopped on his mount, and people began to ask him questions. One of them said: "O Messenger of Allah! I did not know, I thought the stoning should be done after the sacrifice, so I performed the sacrifice before stoning." The Prophet (peace and blessings be upon him) said: "Now perform the stoning, there is no harm." Another person said: "O Messenger of Allah! I did not know, I thought the sacrifice should be done before shaving the head, so I shaved my head before performing the sacrifice." The Prophet (peace and blessings be upon him) said: "Now perform the sacrifice, there is no harm." (The narrator says) On that day, I heard the Prophet (peace and blessings be upon him) that whenever he was asked about any matter by someone who had forgotten or was unaware, meaning he had performed one act before another, or had done something in a different order, the Prophet (peace and blessings be upon him) would say to him: "Now do it, there is no harm."