[Say: "Our life takes its] hue from God! And who could give a better hue [to life] than God, if we but truly worship Him?"
Al-Baqara (The Cow) Verse 138
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