Genesis 2:1-2

2:1 The heavens and the earth were completed with everything that was in them. 2:2 By the seventh day God finished the work that he had been doing, and he ceased on the seventh day all the work that he had been doing.

Exodus 20:11

20:11 For in six days the Lord made the heavens and the earth and the sea and all that is in them, and he rested on the seventh day; therefore the Lord blessed the Sabbath day and set it apart as holy.

Exodus 31:17

31:17 It is a sign between me and the Israelites forever; for in six days the Lord made the heavens and the earth, and on the seventh day he rested and was refreshed.’”