This essay is meant to reveal the immaculateness in Lord's Speech and manner of statement, free of any obscenities or dishonesty. For we believe that in addition to His particular emphasis on politeness and courtesy toward others noticed everywhere in His Holy Book, Quran, Holy God himself has purity of speech and no intention of dishonoring anyone. Also we intend to show how God interprets obscenities; how His Holiness has performed and what art he has taken advantage of in talking of indecencies, obscenities and whatever that may seem obscene in men's eyes. Regarding the fact that the intensity of immaculateness of Quran is more deeply shown in statements of sarcasm, satire and command, we will analyze them in this regard, mentioning frequent examples and trying to expose to the addressee in this opportunity, the immaculateness and purity of speech, hoping that it would not be explaining what is already explained.