Surah 2

Surah 2:264

"You who believe! Do not invalidate your freewill offerings by insult and injury, like the one who contributes his wealth in order to be seen by the people, but who does not believe in God and the Last Day. His parable is like the parable of a smooth rock with dirt on top of it. A heavy rain smites it (and) leaves it bare. They have no power over anything they have earned. God does not guide the people who are disbelievers."