HAD WE bestowed this Qur’an from on high upon a mountain, thou wouldst indeed see it humbling itself, breaking asunder for awe of God. And [all] such parables We propound unto men, so that they might [learn to] think.
Al-Hashr (The Gathering) Verse 21
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
Sahih Bukhari: Volume 1, Book 2, Number 11