Exodus 31:13-17

¹³“Now as for you, speak to the sons of Israel, saying, ‘You must keep My Sabbaths; for this is a sign between Me and you throughout your generations, so that you may know that I am the Lord who sanctifies you. ¹⁴Therefore you are to keep the Sabbath, for it is holy to you. Everyone who profanes it must be put to death; for whoever does any work on it, that person shall be cut off from among his people. ¹⁵For six days work may be done, but on the seventh day there is a Sabbath of complete rest, holy to the Lord; whoever does any work on the Sabbath day must be put to death. ¹⁶So the sons of Israel shall keep the Sabbath, to celebrate the Sabbath throughout their generations as a permanent covenant.’ ¹⁷It is a sign between Me and the sons of Israel forever; for in six days the Lord made heaven and earth, but on the seventh day He ceased from labor, and was refreshed.”