Say (O Muhammad SAW): "Shall We tell you the greatest losers in respect of (their) deeds? "Those whose efforts have been wasted in this life while they thought that they were acquiring good by their deeds! (Surah Al-Kahf: 103-104)
On the authority of Abu Harayrah (may Allah be pleased
with him) from the Prophet (peace be upon him), who said: Allah (mighty and
sublime be He) said: Spend (on charity), O son of Adam, and I shall spend on
you.