Quran 2:272 — The Heifer (Al-Baqarah)

You are not responsible for guiding anyone. GOD is the only one who guides whoever chooses (to be guided). Any charity you give is for your own good. Any charity you give shall be for the sake of GOD. Any charity you give will be repaid to you, without the least injustice.

[2:271] If you declare your charities, they are still good. But if you keep them anonymous, and give them to the poor, it is better for you, and remits more of your sins. GOD is fully Cognizant of everything you do.

[2:273] Charity shall go to the poor who are suffering in the cause of GOD, and cannot emigrate. The unaware may think that they are rich, due to their dignity. But you can recognize them by certain signs; they never beg from the people persistently. Whatever charity you give, GOD is fully aware thereof.