The Principle of Irrevocability is one of the fundamental tenets of contract law, deeply rooted in Islamic jurisprudential foundations. Although the status of being revocable or irrevocable for nominate contracts is explicitly defined in both jurisprudence and civil law, the existence of this principle within the legal and jurisprudential framework remains essential—contrary to what is occasionally asserted—especially in light of the acceptance of the theory of non-restrictive contracts and the principle of Freedom of Contract (Article 10 of the Civil Law). The incomplete reflection of the Principle of Irrevocability in Article 219 of the Civil Law, along with a certain confusion between "prohibitory rulings" and "declaratory rulings", has led to several disputes. The most significant flaw of the aforementioned article is its simultaneous treatment of three major principles: the irrevocability of contracts, the obligatory nature of performance, and the privity of contract. While some legal scholars interpret Asl al-Luzum as the "binding nature" of a contract and argue for its applicability to both irrevocable and revocable contracts, the core of this principle typically applies where the nature of the contract is inherently doubtful. Nonetheless, this study, employing a descriptive-analytical method, seeks to propose a modern and expanded concept of the Principle of Irrevocability, extending its scope to three additional domains: contracts whose irrevocability is certain, revocable contracts, and unilateral juridical acts. This novel concept, which can be termed the "Principle of Stability of Juridical Acts" or the "Principle of Non-Rescindability of Juridical Acts," is applicable in both legal discourse (legal doubts) and judicial practice (factual doubts). It is proposed that this definition replace Article 219 of the Civil Law in expressing the Principle of Irrevocability as follows: "Every juridical act, once concluded, is non-rescindable unless its rescindability is expressly provided for by law or contract.".