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.
What is the intention?
The Night/92:18
He who cleanses himself by giving his wealth;
Prophet Hud/11:114
Observe the prayer at both ends of the day and the close part of the night. The good deeds wipe away the evil deeds. This is an admonition for those who will take admonition.
The Cow/2:271
How good it would be if you revealed your charity. But it is better if you hide them and give them to the needy, and that will cover some of your sins. Allah is aware of what you do.