Believers! Do not nullify your acts of charity by stressing your benevolence and causing hurt as does he who spends his wealth only to be seen by men and does not believe in Allah and the Last Day. The example of his spending is that of a rock with a thin coating of earth upon it: when a heavy rain smites it, the earth is washed away, leaving the rock bare; such people derive no gain from their acts of charity. Allah does not set the deniers of the Truth on the right way. "
Quran(2:262 - 264)