Why did the Prophet (peace and blessings be upon him) ask 'Umar to bring Uwais al-Qarani so that he would seek forgiveness for him?
Machine translationRead the Arabic original
The questioner : In Za'im Muslim, there is a hadith of 'Umar in which the Prophet (peace and blessings be upon him) said: "If you meet Uwais, ask him to seek forgiveness for you." Yes.
The Shaykh : Yes, this is specific to him.
The questioner : And what made his face specific?
The Shaykh : It is specific because it is a karamah (a miracle granted to a righteous person) for him due to his dutifulness to his mother. For this reason, the Messenger did not ask the people to ask Abu Bakr to seek forgiveness for them, even though he is better than Uwais al-Qarani.
The Shaykh : Yes, this is specific to him.
The questioner : And what made his face specific?
The Shaykh : It is specific because it is a karamah (a miracle granted to a righteous person) for him due to his dutifulness to his mother. For this reason, the Messenger did not ask the people to ask Abu Bakr to seek forgiveness for them, even though he is better than Uwais al-Qarani.
Source
قناة «فضيلة الشيخ محمد بن صالح العثيمين»، 2486 - 4600 لماذا طلب النبي صلى الله عليه وسلم من عمر أن يأتي أويس القرني ليستغفر له؟ ابن عثيمين — youtube.com
The Arabic text is a machine transcription of the audio recording.