Narrated Az-Zuhri: I heard `Urwa bin Az-Zubair talking to `Umar bin `Abdul `Aziz during the latter's Governorship (at Medina), he said, Al-Mughira bin Shu`ba delayed the `Asr prayer when he was the ruler of Al-Kufa. On that, Abu Mas`ud. `Uqba bin `Amr Al-Ansari, the grand-father of Zaid bin Hasan, who was one of the Badr warriors, came in and said, (to Al-Mughira), 'You know that Gabriel came down and offered the prayer and Allah's Apostle prayed five prescribed prayers, and Gabriel said (to the Prophet ), I have been ordered to do so (i.e. offer these five prayers at these fixed stated hours of the day).