Sahih al-Bukhari 7302

Nafi' ibn 'Umar related that Ibn Abi Mulayka said, "The two good men were about to be destroyed: Abu Bakr and 'Umar. When the delegation of the Banu Tamim came to the Prophet, may Allah bless him and grant him peace,, one of them suggested that he appoint al-Aqra' ibn Habis al-Hanzali, the brother of the Banu Mujashi', and the other suggested someone else. Abu Bakr said to 'Umar, 'You just wanted to contradict me.' 'Umar said, "I did not want to contradict you," and they raised their voices in the presence of the Prophet , may Allah bless him and grant him peace. Then it was revealed: 'You who believe! do not raise your voices above the voice of the Prophet and do not be as loud when speaking to him as you are when speaking to one another, lest your actions should come to nothing without your realising it. Those who lower their voices when they are with the Messenger of Allah are people whose hearts Allah has tested for taqwa. They will have forgiveness and an immense reward.' (49:2-3)?" Ibn Abi Mulayka said, that Ibn az-Zubayr said, "Afterwards � and he did not mention the same about his grandfather, i.e. Abu Bakr � whenever 'Umar spoke to the Prophet, may Allah bless him and grant him peace, about something, he spoke to him like someone confiding a secret which he could not hear and had to ask him to repeat it."