Prophet Jonah - 10:68
"They said: "Allah has adopted a child!"He is far greater than that. He is the One who does not need anything. To Him belongs whatever is in the heavens and whatever is in the earth. You have no proof in this matter. Do you say about Allah what you do not know?"
Everything that the believers practice in the name of religion is based on the Book:
The Cattle/6:157
"Nor can you say, "If the Book had been sent down to us, we would have been on a more right path than them". There has come to you a proof from your Lord, a guidance and a mercy. Who is more unjust than he who denies the signs of Allah and turns away from them? We will punish those who turn away from Our Verses with the worst of torment for their turning away."
The Women/4:174
People! A proof has come to you from your Lord and We have sent down upon you a clear light.
The Kneeling/45:20
These are enlightening proofs for the people, a guide and mercy for a people who have firm faith.
The Stories/28:75
"We choose a witness from each community and say, "Bring your evidence."Then they will know that all truth belongs to Allah, and what they used to fabricate will leave them and disappear."