This paper argues that sura 53 contains a number of problems, of which the most intractable is the question: who is speaking in the oracular, part I? The answer is not God, nor is it easy to see how it could be the Prophet. Since the Prophet is undoubtedly responsible for the sura as a whole, the solution tentatively proposed here is that he found part I in an earlier text current among his people, such as a collection of oracular verdicts.