وَالَّذِينَ كَفَرُوا أَعْمَالُهُمْ كَسَرَابٍ بِقِيعَةٍ يَحْسَبُهُ الظَّمْآنُ مَاءً حَتَّىٰ إِذَا جَاءَهُ لَمْ يَجِدْهُ شَيْئًا وَوَجَدَ اللَّـهَ عِندَهُ فَوَفَّاهُ حِسَابَهُ ۗ وَاللَّـهُ سَرِيعُ الْحِسَابِ ﴿٣٩﴾

Wallazeena kafarooo a'maaluhum kasaraabim-biqee'atin yahsabuhu-zam'aanu maaa'an hattaaa izaa jaaa'ahoo lam yajidhu shai'an wa wajadallaaha 'indahoo fawaffaahu hisaabah; wallaahu saree'ul-hisaab.

(39) But those who disbelieved - their deeds are like a mirage in a lowland which a thirsty one thinks is water until, when he comes to it, he finds it is nothing but finds Allah before Him, and He will pay him in full his due; and Allah is swift in account.

Reference: Sura Noor 24:39