22. Al-Hajj (The Pilgrimage)

Surah: 22   Aya: 11

11. Wamina alnnasi man yaAAbudu Allaha AAala harfin fa-in asabahu khayrun itmaanna bihi wa-in asabat-hu fitnatun inqalaba AAala wajhihi khasira alddunya waal-akhirata thalika huwa alkhusranu almubeenu
  

  Translation

11. And among mankind is he who worships Allâh as it were, upon the very edge (i.e. in doubt); if good befalls him, he is content therewith; but if a trial befalls him, he turns back on his face (i.e. reverts back to disbelief after embracing Islâm). He loses both this world and the Hereafter. That is the evident loss.