Exodus 31:17 It is a sign between me and the children of Israel for ever: for in six days the LORD made heaven and earth, and on the seventh day he rested, and was refreshed.

Genesis 2:1 Thus the heavens and the earth were finished, and all the host of them.

Genesis 2:2 And on the seventh day God ended his work which he had made; and he rested on the seventh day from all his work which he had made.

Deuteronomy 5:15 And remember that thou wast a servant in the land of Egypt, and that the LORD thy God brought thee out thence through a mighty hand and by a stretched out arm: therefore the LORD thy God commanded thee to keep the sabbath day.