And the LORD said to Moses, “Tell the Israelites, ‘Surely you must keep My Sabbaths, for this will be a sign between Me and you for the generations to come, so that you may know that I am the LORD who sanctifies you… It is a sign between Me and the Israelites forever; for in six days the LORD made the heavens and the earth, but on the seventh day He rested and was refreshed.’”
Exodus 31:12-17 (BSB)
Given in the wilderness, to people with no farms and no houses, about stopping. Verses 14 to 16 are elided here; the sign and the reason are in 13 and 17.



