(1)
A'ishah (RAA) narrated that the Messenger of Allah (ﷺ) said:
"Do not speak badly of the dead, they have already seen the result of (the deeds) that they sent on before them." Related by Al·Bukhari. (AR)
Reference (AR): Bulugh al-Maram 596 (AR)
In-book reference (AR): Book 3, Hadith 65 (AR)
English translation (AR): Book 3, Hadith 621 (AR)