The Family Of Imran - 3:84
"Say: "We believe in Allah and in what has been sent down to us, and in what was sent down to Abraham and Ishmael and Isaac and Jacob and their descendants, and in what was given to Moses and Jesus and the prophets from their Lord, and we make no distinction between any of them, and to Him we are the submissive ones."
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.