Qays bin al-Rabi' (may Allah have mercy on him) said: I asked Ja'far bin Muhammad (may Allah have mercy on him) about the Qur'an, and he said: It is the speech of Allah. I said: Is it created? He said: No. I said: What is your view about one who says it is created? He said: He should be killed, and he should not even be asked to repent.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 20888