The document discusses the mathematical patterns and relationships found in the Quran related to the number 19. It provides numerous examples showing how aspects of the Quran such as the number of chapters, words, letters and verses contain relationships and patterns based on the number 19. The document argues that these mathematical patterns are evidence that the Quran is of divine origin and could not have been authored by humans. It issues a challenge for humans to try and produce a work with the same complexity of mathematical composition as the Quran.