The study of the Old Testament deals with the origin and history of the Old Testament book and includes three topics: First: The history of the text of the Old Testament books. Second: Researching the circumstances and time in which each book appeared separately. Third: The history of collecting the books of the Old Testament, its identification, and the legality of the books.
The study of the Old Testament aims to investigate the origin and history of this group of books. These books include the Word of Revelation, which is the holy book of Judaism, which Christianity also considered a holy book. These books in the New Testament were called the Holy Books:
The Apostle Paul says in his letter to the Romans 1:2 that God had previously promised the Messiah through his prophets in the Holy Scriptures, and the Apostle Paul says in his second Epistle to the Romans 3:15, "And that from childhood you have known the Holy Scriptures."