"The Messenger of Allah said: 'Do not verbally abuse the dead, for they have reached the consequences of what they did."'  

قَالَ رَسُولُ اللَّهِ ﷺ لاَ تَسُبُّوا الأَمْوَاتَ فَإِنَّهُمْ قَدْ أَفْضَوْا إِلَى مَا قَدَّمُوا  

"I heard Anas bin Malik say: The Messenger of Allah said: 'The dead person is followed by three: His family, his wealth and his deeds. Then two of them come back: His family and his wealth, and there remain only his deeds."'  

قَالَ رَسُولُ اللَّهِ ﷺ يَتْبَعُ الْمَيِّتَ ثَلاَثَةٌ أَهْلُهُ وَمَالُهُ وَعَمَلُهُ فَيَرْجِعُ اثْنَانِ أَهْلُهُ وَمَالُهُ وَيَبْقَى وَاحِدٌ عَمَلُهُ  

"The believer owes six duties toward his fellow believer: To visit him when he is sick, to attend his funeral when he dies, to accept his invitation, to greet him with Salam when he meets him, to reply to him (say: Yarhamuk Allah, may Allah have mercy on you) when he sneezes and to be sincere to him, whether he is absent or present." (Hasan).  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لِلْمُؤْمِنِ عَلَى الْمُؤْمِنِ سِتُّ خِصَالٍ يَعُودُهُ إِذَا مَرِضَ وَيَشْهَدُهُ إِذَا مَاتَ وَيُجِيبُهُ إِذَا دَعَاهُ وَيُسَلِّمُ عَلَيْهِ إِذَا لَقِيَهُ وَيُشَمِّتُهُ إِذَا عَطَسَ وَيَنْصَحُ لَهُ إِذَا غَابَ أَوْ شَهِدَ