Abu Huraira reported Messenger of Allah ﷺ as saying: Six are the rights of a Muslim over another Muslim. It was said to him: Allah's Messenger, what are these? Thereupon he said:
* When you meet him, offer him greetings;
* When he invites you to a feast accept it.
* When he seeks your council give him,
and
* When he sneezes and says:" All praise is due to Allah," you say Yarhamuk Allah (may Allah show mercy to you);
and
* When he fails ill visit him;
and
* When he dies follow his bier.

حَدَّثَنَا يَحْيَى بْنُ أَيُّوبَ، وَقُتَيْبَةُ، وَابْنُ، حُجْرٍ قَالُوا حَدَّثَنَا إِسْمَاعِيلُ، - وَهُوَ ابْنُ جَعْفَرٍ - عَنِ الْعَلاَءِ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ " حَقُّ الْمُسْلِمِ عَلَى الْمُسْلِمِ سِتٌّ " . قِيلَ مَا هُنَّ يَا رَسُولَ اللَّهِ قَالَ " إِذَا لَقِيتَهُ فَسَلِّمْ عَلَيْهِ وَإِذَا دَعَاكَ فَأَجِبْهُ وَإِذَا اسْتَنْصَحَكَ فَانْصَحْ لَهُ وَإِذَا عَطَسَ فَحَمِدَ اللَّهَ فَسَمِّتْهُ وَإِذَا مَرِضَ فَعُدْهُ وَإِذَا مَاتَ فَاتَّبِعْهُ " .