18. Al-Kahf (The Cave)

Surah: 18   Aya: 7

7. Inna jaAAalna ma AAala al-ardi zeenatan laha linabluwahum ayyuhum ahsanu AAamalan
  

  Translation

7. Verily! We have made that which is on earth as an adornment for it, in order that We may test them (mankind) as to which of them are best in deeds. [i.e.those who do good deeds in the most perfect manner, that means to do them (deeds) totally for Allâh's sake and in accordance to the legal ways of the Prophet SAW ].