'Keep the Sabbath' in the Bible

Wherefore let the children of Israel keep the Sabbath, that they observe it throughout their generations, that it be an covenant forever.

'Keep the Sabbath day that thou sanctify it, as the LORD thy God hath commanded thee.

And remember that thou wast a servant in the land of Egypt, and how that the LORD God brought thee out thence with a mighty hand and a stretched out arm. For which cause the LORD thy God commandeth thee to keep the Sabbath day.