There are five qualities which a Muslim should display to his brother : return of salutation, response to the one who sneezes, acceptance of the invitation, paying sick visit to a patient, and accompanying the funeral.
قَالَ رَسُولُ اللَّهِ ﷺ خَمْسٌ تَجِبُ لِلْمُسْلِمِ عَلَى أَخِيهِ رَدُّ السَّلاَمِ وَتَشْمِيتُ الْعَاطِسِ وَإِجَابَةُ الدَّعْوَةِ وَعِيَادَةُ الْمَرِيضِ وَاتِّبَاعُ الْجَنَازَةِ