Exodus 5:14

5:14 The Israelite foremen whom Pharaoh’s slave masters had set over them were beaten and were asked, “Why did you not complete your requirement for brickmaking as in the past – both yesterday and today?”

Exodus 31:15

31:15 Six days work may be done, but on the seventh day is a Sabbath of complete rest, holy to the Lord; anyone who does work on the Sabbath day must surely be put to death.

Exodus 35:2

35:2 In six days work may be done, but on the seventh day there must be a holy day for you, a Sabbath of complete rest to the Lord. Anyone who does work on it will be put to death.