Charity
To give charity publicly is good, but to give to the poor privately is better for you, and will absolve you of your sins. And Allah is All-Aware of what you do. You are not responsible for people’s guidance (Muhammad) — it is Allah Who guides whoever He wills. Whatever you give in charity is certainly well known to Allah. Those who spend their wealth in charity day and night, secretly and openly — their reward is with their Lord, and there will be no fear for them, nor will they grieve.
—Quran 2:271–274
Those who believe, and do good deeds, and pray regularly, and give charity — they will have their reward with their Lord; they will have no fear, nor shall they grieve.
―Quran 2:277
وَالصَّدَقَةُ تُطْفِئُ الْخَطِيئَةَ كَمَا يُطْفِئُ الْمَاءُ النَّارَ
“Charity (Sadaqah) extinguishes sin, just as water extinguishes fire.”
―Prophet Muhammad, peace be upon him.
Reference: Jami` at-Tirmidhi » The Book on Traveling » Hadith 71
-note: giving Charity is the third pillar of Islam.