Saydna Saeed Bin Aas رضیﷲ عنه was from one of the four whom Saydna Usman عليه السلام appointed to compile the Qur'an in one mus'haf, it was known about him that:
انَ أَشْبَهَ النَّاسُ بِرَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ
"He resembles the most to Rasool صلی اللہ علیہ وسلم in accent and the way of talking".
Al bidayah wan Nihayah la Ibn Kathir 11/317.