He was not considered from among the group of Sahaba but he was the foremost of Tabaayi
He lived during Rasoolullah sallallahu alaihi wasallam period, but somehow cud’ not meet him, coz he has to take care of his mother.
Rasoolullah sallallahu alaihi wasallam Informed Umar raziallahu anhu that when u meet him, request him to pray for your forgiveness
Name this great personality?
Answer
Owais Al Qarni rehmathullahi alaih
https://islamqa.info/en/125276