Final answer:
The source associated with the use of "Elohim" and emphasis on ritual observance, dated around 600 BCE, is associated with the D (Deuteronomist) document in the Documentary Hypothesis.
Step-by-step explanation:
The source dated around 600 BCE, which prefers the use of "Elohim," conceptualizes God as a cosmic deity, and is much more concerned with ritual observance (such as the Sabbath), is associated with the D (Deuteronomist) document in the Documentary Hypothesis. The specific document that focuses on these characteristics is known as the Deuteronomist source.