Ahmadun Yosi Herfanda is a widely recognized Sufistic-religious poet, known for his poetry book When Grass Meets God. The book is divided into two parts: The First Kiss for God and the influential Prayer of Grass. This compilation showcases the significance of prophetic literary ethics in Herfanda's creations. This study aims to uncover the prophetic literary ethics within When Grass Meets God, employing a semiotic approach guided by Paul Recoeur's hermeneutics. The research primarily relies on the poems within the book as data sources. To identify instances of prophetic literary ethics, the study analyzes words, phrases, and sentences that exemplify these principles. The analytical method employed is hermeneutic reading. The book reveals three distinct forms of prophetic literary ethics. Firstly, the poems embody an epistemology of transcendental structuralism, presenting the ethical principles of prophetic literature. Secondly, poems serve as a means of worship, embodying the ethical principles of prophetic literature. Lastly, they establish inter-conscious relationships, further reflecting these ethical principles.