Every single word and sentence of eloquent words have been selected and arranged in a purposeful and logical way. The Quranic researchers have sought to discover the way of relation and the philosophy of the arrangement (order and formation) of the Qur'anic verses since the Quran is the most eloquent word. The process (semantic relations) is also defined in this way in order to provide a simple understanding of how the verses of the Qur'anic chapters are related. The content of each sura is divided into several semantic domains and the relationship between these relations is examined based on this new process. In this paper, the process (semantic relations) is adapted to the two suras (Arabic: سورة, chapters) of Ash-Shams (Arabic: الشمس) and al-Layl (Arabic: اللیل) in a descriptive analytical method to find an answer to the question of how the application of the process of semantic relations leads to the discovery of the textual coherence of Suras Ash-Shams and al-Layl. Finally, it is concluded that there is a central semantic relation in each of these two surahs that the rest of the relations are arranged in different methods of expressing in order to prove or believability and better understanding of that central meaning.