The One Covering Himself - 73:20
Your Lord knows that you and a group of your companions get up less than two-thirds, half and one-third of the night. Allah determines the amount of the night and the day. He has forgiven you because He knows that you cannot do it. So read from the Qur´an as much as is easy for you. He knows that among you are the sick, those who seek sustenance from the bounty of Allah in the earth, and those who fight in the way of Allah. Read from it as much as is easy for you. Observe the prayer, pay the zakat, and make a debt to Allah through good deeds. Whatever good you do for yourselves you will find a better and greater reward in the sight of Allah. Seek forgiveness from Allah; Allah is Forgiving, Merciful.
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"."