(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. (RU)
Reference (RU): Bulugh al-Maram 596 (RU)
In-book reference (RU): Book 3, Hadith 65 (RU)
English translation (RU): Book 3, Hadith 621 (RU)