Sahih Bukhari Volume 1, Book 10, Hadith Number 500
Narated By Ibn Shihab : Once’Umar bin ‘Abdul ‘Aziz delayed the prayer and ‘Urwa bin Az-Zubair went to him and said, “Once in ‘Iraq, Al-MughTra bin Shu’ba delayed his prayers and Abi Mas’ud Al-Ansari went to him and said, ‘O…