Al-Bara' bin 'Azib said: "The Messenger of Allah (ﷺ) commanded us to do seven things: He commanded us to attend funerals, visit the sick, to reply (say: Yarhamuk Allah ) to one who sneezes, to accept invitations, to support the oppressed, to fulfill oaths (when adjured by another) and to return greetings of Salaam."
Source: sunnah.com
Other translations
Arabic
أَخْبَرَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، وَمُحَمَّدُ بْنُ بَشَّارٍ، عَنْ مُحَمَّدٍ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنِ الأَشْعَثِ بْنِ سُلَيْمٍ، عَنْ مُعَاوِيَةَ بْنِ سُوَيْدِ بْنِ مُقَرِّنٍ، عَنِ الْبَرَاءِ بْنِ عَازِبٍ، قَالَ أَمَرَنَا رَسُولُ اللَّهِ صلى الله عليه وسلم بِسَبْعٍ أَمَرَنَا بِاتِّبَاعِ الْجَنَائِزِ وَعِيَادَةِ الْمَرِيضِ وَتَشْمِيتِ الْعَاطِسِ وَإِجَابَةِ الدَّاعِي وَنَصْرِ الْمَظْلُومِ وَإِبْرَارِ الْقَسَمِ وَرَدِّ السَّلاَمِ .
sunnah.com