The documentary hypothesis (DH) is one of the models used by biblical scholars to explain the origins and composition of the Torah (or Pentateuch, the first five books of the Bible: Genesis, Exodus, Leviticus, Numbers, and Deuteronomy). A version of the documentary hypothesis, frequently identified with the German scholar Julius Wellhausen, was almost universally accepted for most of the 20th century. It posited that the Pentateuch is a compilation of four originally independent documents: the Jahwist (J), Elohist (E), Deuteronomist (D), and Priestly (P) sources. The first of these, J, was dated to the Solomonic period (c. 950 BCE). E was dated somewhat later, in the 9th century BCE, and D was dated just before the reign of King Josiah, in the 7th or 8th century. Finally, P was generally dated to the time of Ezra in the 5th century BCE. The sources would have been joined together at various points in time by a series of editors or "redactors."

The consensus around the classical documentary hypothesis has now collapsed. This was triggered in large part by the influential publications of John Van Seters, Hans Heinrich Schmid, and Rolf Rendtorff in the mid-1970s, who argued that J was to be dated no earlier than the time of the Babylonian captivity (597–539 BCE), and rejected the existence of a substantial E source. They also called into question the nature and extent of the three other sources. Van Seters, Schmid, and Rendtorff shared many of the same criticisms of the documentary hypothesis, but were not in complete agreement about what paradigm ought to replace it. As a result, there has been a revival of interest in "fragmentary" and "supplementary" models, frequently in combination with each other and with a documentary model, making it difficult to classify contemporary theories as strictly one or another. Modern scholars also have given up the classical Wellhausian dating of the sources, and generally see the completed Torah as a product of the time of the Persian Achaemenid Empire (probably 450–350 BCE), although some would place its production as late as the Hellenistic period (333–164 BCE), after the conquests of Alexander the Great.