'Observe the Sabbath' in the Bible

And the children of Israel shall keep the sabbath, to observe the sabbath throughout their generations it is an everlasting covenant.

And thou shalt remember that thou wast a bondman in the land of Egypt, and that Jehovah thy God brought thee out thence with a powerful hand and with a stretched-out arm; therefore Jehovah thy God hath commanded thee to observe the sabbath day.