You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "where did the concept of a week come from?" whose answer is Judaism.
Each document should contain about 30 words, and these documents should contain useful information.

Query: origin of the week
Useful Output:

Doc 1: They named the seven days after Mars, Mercury, Jupiter, Venus, and Saturn, as well as the Moon and the Sun (originally thought of as planets).
Doc 2: The days of the week in English were firstly nominated by the Romans, after the Roman Invasion in Britannia, the land that we know today by
Doc 3: The Babylonians named the first two days of the week Sunday and Monday. These are pretty straightforward — Sunday for the Sun and Monday for the
Doc 4: It's also true that ancient societies named these celestial bodies after their various gods and goddesses. However, the facts of history prove
Doc 5: Ever wondered about where the names of the days of the week come from? You might have heard that the English days of the week are named