Exo 20:8-11 “Remember the Sabbath day by keeping it holy. (9) Six days you shall labor and do all your work, (10) but the seventh day is a sabbath to the LORD your God. On it you shall not do any work, neither you, nor your son or daughter, nor your male or female servant, nor your animals, nor any foreigner residing in your towns. (11) For in six days the LORD made the heavens and the earth, the sea, and all that is in them, but he rested on the seventh day. Therefore the LORD blessed the Sabbath day and made it holy.
Exo 31:13-16 “Say to the Israelites, ‘You must observe my Sabbaths. This will be a sign between me and you for the generations to come, so you may know that I am the LORD, who makes you holy. (14) “‘Observe the Sabbath, because it is holy to you. Anyone who desecrates it is to be put to death; those who do any work on that day must be cut off from their people. (15) For six days work is to be done, but the seventh day is a day of sabbath rest, holy to the LORD. Whoever does any work on the Sabbath day is to be put to death. (16) The Israelites are to observe the Sabbath, celebrating it for the generations to come as a lasting covenant.