The Women - 4:173
He will pay in full the rewards of those who believe and do righteous deeds, and He will give them more of His bounty. And those who despise and are arrogant, He will punish them with a painful torment. They will find for themselves neither a master nor a helper besides Allah.
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.