The research prepared by Dr. Nazih Kamal Hamad addresses the concept of Obligation in financial transactions, defining Obligation as a legal duty imposed on a person to perform or refrain from an act for the benefit of another. Obligation is divided into two types: **compulsory Obligation**, which is imposed by Sharia such as Zakat, and **optional Obligation**, which arises from the will of the person, such as contracts. The research also reviews the concepts of covenant and commitment in Islami...