The LORD said to Moses:
References for Exodus 31:12
Tell the Israelites: "Be sure to keep my sabbaths, because the Sabbath is a sign between me and you in every generation so you will know that I am the LORD who makes you holy.
Keep the Sabbath, because it is holy for you. Everyone who violates the Sabbath will be put to death. Whoever does any work on the Sabbath, that person will be cut off from the people.
Do your work for six days. But the seventh day is a Sabbath of complete rest that is holy to the LORD. Whoever does any work on the Sabbath day will be put to death.
The Israelites should keep the Sabbath. They should observe the Sabbath in every generation as a covenant for all time.
It is a sign forever between me and the Israelites that in six days the LORD made the heavens and the earth, and on the seventh day the LORD rested and was refreshed."
When God finished speaking with Moses on Mount Sinai, God gave him the two covenant tablets, the stone tablets written by God's finger.