Riyad as-Salihin, Book 2, Hadith 697 (In-Book) ⓘ
'Aishah (May Allah be pleased with her) reported: the speech of Messenger of Allah was so clear that all those who listened to it would understand it.[Abu Dawud].
وعن عائشة رضي الله عنها قالت: كان كلام رسول الله صلى الله عليه وسلم كلاماً فصلاً يفهمه كل من يسمعه. ((رواه أبو داود)).