"…for in return the LORD your God will bless you in all your efforts and in all your undertakings", the necessary condition being that the charity given by the person be from what the Almighty has granted him, each person from the work he has done or from commerce done in good faith. Not, heaven forbid, from theft, for the Almighty abhors theft. Giving charity (from what one has obtained) through theft or robbery, even if stolen from a non-Jew or the like, will not only not be considered the fulfillment of a commandment but will act as a curse, and strengthen the sitra akhra (dark side). Any suspicion of theft or of oppression in charity, makes each penny rise towards the Holy One, blessed by He, in vilification, in particular when it is obtained through theft from a non-Jew. That nation's angel immediately rises in denunciation to the effect that the act of charity originates in his nation's monies, and instead of the deed acting on one's behalf, it acts as prosecution, heaven forbid.