حَدَّثَنَا مُحَمَّدُ بْنُ دَاوُدَ بْنِ سُفْيَانَ، وَخُشَيْشُ بْنُ أَصْرَمَ، قَالاَ حَدَّثَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنِ الزُّهْرِيِّ، عَنِ ابْنِ الْمُسَيَّبِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ خَمْسٌ تَجِبُ لِلْمُسْلِمِ عَلَى أَخِيهِ رَدُّ السَّلاَمِ وَتَشْمِيتُ الْعَاطِسِ وَإِجَابَةُ الدَّعْوَةِ وَعِيَادَةُ الْمَرِيضِ وَاتِّبَاعُ الْجَنَازَةِ ‏"‏ ‏.‏

Abu Hurairah reported the Messenger of Allah (May peace be upon him) as saying: 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. Translation Not Available

Book Ref: Sunan Abi Dawud Book 43 Hadith 5030
Web Ref:  Sunan Abi Dawud Book 42 Hadith 5012