Exodus 31:12-18 - Provision Of Rest From Work
12 And the Lord said to Moses, 13 Say to the Israelites, Truly you shall keep My Sabbaths, for it is a sign between Me and you throughout your generations, that you may know that I, the Lord, sanctify you [set you apart for Myself]. 14 You shall keep the Sabbath therefore, for it is holy to you; everyone who profanes it shall surely be put to death; for whoever does work on the Sabbath shall be cut off from among his people. 15 Six days may work be done, but the seventh is the Sabbath of rest, sacred to the Lord; whoever does work on the Sabbath day shall surely be put to death. 16 Wherefore the Israelites shall keep the Sabbath to observe it throughout their generations, a perpetual covenant. 17 It is a sign between Me and the Israelites forever; for in six days the Lord made the heavens and earth, and on the seventh day He ceased and was refreshed.
18 And He gave to Moses, when He had ceased communing with him on Mount Sinai, the two tables of the Testimony, tables of stone, written with the finger of God.