The Prophet ﷺ said, "Don't abuse the dead, because they have reached the result of what they forwarded." (Using translation from Bukhārī 1393)  

قَالَ رَسُولُ اللَّهِ ﷺ «لَا تَسُبُّوا الْأَمْوَاتَ فَإِنَّهُمْ أَفْضَوْا إِلَى مَا قَدَّمُوا»