بسم الله الرحمن الرحيم ''In the name of ALLAH,The most Gracious,Most Merciful.

BELIF-SAHIH BUKARI-Narrated 'Abdullah bin 'Amr: A man asked the Prophet , "What sort of deeds or (what qualities of) Islam are good?" The Prophet replied, 'To feed (the poor) and greet those whom you know and those whom you do not Know (See Hadith No. 27).