When was the elohist source written?
Just so, when was the yahwist source written?
The story of the Flood provides an exceptionally clear example of a case where these two stories have been woven together. For a long time, the Yahwist source was thought to have been composed in Jerusalem early in the period of the monarchy, perhaps as early as the tenth century BCE.
Additionally, when was the priestly source written?
Scholars agree that Leviticus belongs to the Priestly (P) source of the Pentateuchal traditions. This material is dated according to one theory in the 7th century bc and is regarded as the law upon which Ezra and Nehemiah based their reform.
Date. Julius Wellhausen, the 19th century German scholar responsible for the classical form of the documentary hypothesis, did not attempt to date J more precisely than the monarchical period of Israel's history.