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The study of text cohesion is a linguistic tool for understanding the structure of Persian literary works based on objective and accurate descriptions using a single model. In this paper, verses from Sanai’s Hadiqat al-Haqiqah (The Walled Garden of the Truth) were studied using the theory of text cohesion by Halliday and Hassan in systemic linguistics and the results were presented in diagrams. According to this theory, cohesion has grammatical, lexical and relational devices each of which includes more detailed devices. The purpose of this paper is to analyze each of these cohesive devices in Sanai’s Hadiqat. The research method is descriptive and each of the cohesive devices is investigated by mentioning couplet samples and their repetition frequencies. The results show that among the various types of cohesion, lexical cohesion, especially contrasts, and relational cohesion, especially causal relationships, have the greatest effect on the cohesion and integrity of the verses of Hadiqat.