Narrated Al-Sa'ib bin Yazid:
I was standing in the mosque and somebody threw a gravel at me. I looked and found that he was `Umar bin Al-Khattab. He said to me, "Fetch those two men to me." When I did, he said to them, "Who are you? (Or) where do you come from?" They replied, "We are from Ta'if." `Umar said, "Were you from this city (Medina) I would have punished you for raising your voices in the mosque of Allah's Messenger."
Narrated Ibn Abi Mulaika:
`Abdullah bin Az-Zubair said that a group of riders belonging to Banu Tamim came to the Prophet, Abu Bakr said (to the Prophet (ﷺ) ), "Appoint Al-Qa'qa bin Mabad bin Zurara as (their) ruler." `Umar said (to the Prophet). "No! But appoint Al-Aqra bin H`Abis." Thereupon Abu Bakr said (to `Umar). "You just wanted to oppose me." `Umar replied. "I did not want to oppose you." So both of them argued so much that their voices became louder, and then the following Divine Verses were revealed in that connection:-- "O you who believe ! Do not be forward in the presence of Allah and His Apostle..." (till the end of Verse)...(49.1)
Narrated Ibn Abi Mulaika:
The two righteous persons were about to be ruined. They were Abu Bakr and `Umar who raised their voices in the presence of the Prophet (ﷺ) when a mission from Bani Tamim came to him. One of the two recommended Al-Aqra' bin Habeas, the brother of Bani Mujashi (to be their governor) while the other recommended somebody else. (Nafi`, the sub-narrator said, I do not remember his name). Abu Bakr said to `Umar, "You wanted nothing but to oppose me!" `Umar said, "I did not intend to oppose you." Their voices grew loud in that argument, so Allah revealed: 'O you who believe! Raise not your voices above the voice of the Prophet.' (49.2) Ibn Az-Zubair said, "Since the revelation of this Verse, `Umar used to speak in such a low tone that the Prophet (ﷺ) had to ask him to repeat his statements." But Ibn Az-Zubair did not mention the same about his (maternal) grandfather (i.e. Abu Bakr).
Narrated Ibn Abi Mulaika:
Once the two righteous men, i.e., Abu Bakr and `Umar were on the verge of destruction (and that was because): When the delegate of Bani Tamim came to the Prophet, one of them (either Abu Bakr or `Umar) recommended Al-Aqra' bin H`Abis at-Tamimi Al-Hanzali, the brother of Bani Majashi (to be appointed as their chief), while the other recommended somebody else. Abu Bakr said to `Umar, "You intended only to oppose me." `Umar said, "I did not intend to oppose you!" Then their voices grew louder in front of the Prophet (ﷺ) whereupon there was revealed: 'O you who believe! Do not raise your voices above the voice of the Prophet..a great reward.' (49.2-3) Ibn Az-Zubair said, 'Thence forward when `Umar talked to the Prophet, he would talk like one who whispered a secret and would even fail to make the Prophet (ﷺ) hear him, in which case the Prophet (ﷺ) would ask him (to repeat his words).