By zakat is meant that fixed amount which is subtracted at the end of each year by affluent people. In this way the remaining wealth is purified. By one part of it being given to the cause of God, the rest is rendered lawfully usable for the almsgiver. Deducting zakat from one’s earning is a material acknowledgement of the fact that the actual giver is God. Since the giver is God, the recipient is duty bound to spend it in His cause.