Surah 19. Maryam, Ayah 89

The belief in Allah begetting a son is not a question merely of words or of speculative thought. It is a stupendous blasphemy against Allah. It lowers Allah to the level of an animal. If combined with the doctrine of vicarious atonement, it amounts to a negation of Allah's justice and man's personal responsibility. It is destructive of all moral and spiritual order, and is condemned in the strongest possible terms.