Quran 26.190-196
Lo! herein is indeed a portent; yet most of them are not believers. And lo! thy Lord! He is indeed the Mighty, the Merciful. And lo! it is a revelation of the Lord of the Worlds, Which the True Spirit hath brought down Upon thy heart, that thou mayst be (one) of the warners, In plain Arabic speech. And lo! it is in the Scriptures of the men of old.