Do not abuse

Aisha reported: The Prophet, peace and blessings be upon him, said, “Do not abuse the dead, for verily they have reached what they put forward.”

Source: Sahih Bukhari 1329

Grade: Sahih (authentic) according to Al-Bukhari

عَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ قَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَا تَسُبُّوا الْأَمْوَاتَ فَإِنَّهُمْ قَدْ أَفْضَوْا إِلَى مَا قَدَّمُوا