´Narrated 'Urwah:` that 'Aishah said: "The Messenger of Allah (ﷺ) did not speak quickly like you do now, rather he would speak so clearly, unmistakably, that those who sat with him would memorize it."
Hadith Referenceسنن ترمذي / كتاب المناقب عن رسول الله صلى الله عليه وسلم / 3639