The Heights - 7:32
"Say: "Who can forbid the adornments and good provision which Allah has created for His servants?"Say: "They are for the believers in the life of this world, and only for them in the Hereafter."Thus do We explain Our verses in detail for a people who know."
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.