سورة Al-A'raf (The Heights ) - الآية 203

And O dear Prophet (Mohammed – peace and blessings be upon him) when you do not bring to them a verse, they say, “Why did you not fabricate it?” Say, “I follow only what is divinely revealed to me from my Lord”; this (the Holy Qur’an) is an enlightenment from your Lord, and a guidance and a mercy for the Muslims.