The Cow - 2:267
Believers, give as charity from what you have earned and from what We have brought forth for you from the earth. And do not try to give as charity your ill-gotten wealth, which if it were given to you, you would only accept it with your eyes closed. Know that Allah is Rich, Praiseworthy.
The most important criterion of belief:
The Cattle/6:82
Those who believe and do not mix their faith with wrongdoing, they deserve security and they have found the truth.
Luqman/31:13
"When Lokman advised his son, he said: "My dear son, do not associate partners with Allah; surely shirk (associating partners with God) is a great wrong."
The Companies/39:65
It has been revealed to you and those before you that if you associate partners, all that you do will be in vain and you will be of the losers.