Riyad as-Salihin, Book 18, Hadith 1564 (In-Book) ⓘ
'Aishah (May Allah be pleased with her) said: The Messenger of Allah said, "Do not abuse the dead, because they have attained that which they had forwarded (i.e., their deeds, good or bad)."[Al-Bukhari].
وعن عائشة رضي الله عنها قالت: قال رسول الله صلى الله عليه وسلم : "لا تسبوا الأموات فإنهم قد أفضوا إلى ما قدموا" . ((رواه البخاري)).