Hadith 4:139
‘A’isha reported God’s messenger as saying, “Do not revile the dead, for they have come to what they have sent before them.” Bukhari transmitted it.
وَعَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَا تَسُبُّوا الْأَمْوَاتَ فَإِنَّهُمْ قَدْ أَفْضَوْا إِلَى مَا قدمُوا» رَوَاهُ البُخَارِيّ
Original Reference: Mishkat al-Masabih 1664