John Van Seters on the origins of the Pentateuch (the first five books of the bible:Genesis, Exodus, Leviticus, Numbers, Deuteronomy), arguing, with Martin Noth, that Deuteronomy was the original beginning of a history that extended from Deuteronomy to the end of 2 Kings. However, against Noth and others, he held that the so-called Yahwist, the oldest literary source in Genesis, Exodus and Numbers, was written in the 6th century BCE as a prologue to the older Deuteronomistic History, and that the so-called Priestly Writer of the Pentateuch was a later supplement to this history. This approach represented a revival of the "supplementary hypothesis"
Leviticus 19 (26-36) and a general instruction to obey all of God's commands (37). The laws of Leviticus 19 are put in no obvious order, and as a result scholars tend to think that the chapter includes a collection of regulations from various sources. The practice of leaving a portion of crops in the field for poor people or foreigners to use, mentioned in verses 9 and 10, reappears in the second chapter of the book of Ruth. In Judaism, the whole chapter is part of the weekly Torah portion (parashah) "Kedoshim" () which comprises Leviticus 19:1-20:27. Leviticus 19 Leviticus 19 is