Ezra 1 is the first chapter of the Book of Ezra in the Old Testament of the Christian Bible, or the book of Ezra–Nehemiah in the Hebrew Bible, which treats the book of Ezra and book of Nehemiah as one book. Jewish tradition states that Ezra is the author of Ezra–Nehemiah as well as the Book of Chronicles, but modern scholars generally believe that a compiler from the 5th century BCE is the final author of these books.