The Women - 4:77
"Have you not paid attention to those who were told, "Keep your hands off the war, observe the prayer and pay the zakat"? When they were commanded to fight, they began to fear mankind as they feared Allah, perhaps more, and they said, "Our Lord, why have you burdened us with war, could you not have postponed it until a near time?"Say, "This world is but a little, and the Hereafter is better for the righteous, and you will not be wronged in the slightest."
The importance of zakat:
The Cattle/6:16
Whoever is turned away from torment on that Day, (God) has mercy on him. That is the greatest victory.
The Heights/7:156
"Write for us good in this world and in the Hereafter. We turn to you."He said: "My punishment will touch whom I will. But My Mercy is all-encompassing; I will write it especially for those who lead a righteous life, pay the zakat and believe in Our verses."
The Romans/30:39
The usury money which you give to increase in the wealth of the people does not increase with Allah. But as for the zakat which you give seeking Allah´s Pleasure, those who give it multiply their investment.
The Hypocrites/63:10
"Give out of what We have provided for charity before death comes to you and you say, "My Lord, if only You would postpone me for a short time so that I may be of the righteous by helping the poor"."