Abdullah bin Amr bin al-As (may Allah be pleased with them both) said: I saw the Messenger of Allah (peace be upon him) at the Jamrah, and people were asking him questions about religious matters. One man said: O Messenger of Allah! I performed the sacrifice before the stoning. He said: "Do the stoning, there is no harm." Another said: I shaved my head before the sacrifice? He said: "Go and perform the sacrifice, there is no harm." In short, whatever was asked of the Prophet (peace be upon him) regarding doing something before or after its due time, he replied: "Do it now, there is no harm."