Use "observe the sabbath" in a sentence

1. Does the encouragement to observe the Sabbath apply to them?

2. For example, they could abstain from forbidden foods and observe the Sabbath.

3. * The inhabitants of Zion are to observe the sabbath day, D&C 68:29.

4. However, at the same time, Seventh-Day Adventists less than 500 miles [800 km] away in Fiji are not resting because it is Sunday there, and they observe the Sabbath on Saturday!