Exodus 31:14
"Ye shall keep the sabbath therefore; for it is holy unto you: every one that defileth it shall surely be put to death: for whosoever doeth any work therein, that soul shall be cut off from among his people."
Cross References (ranked by relevance)
And madest known unto them thy holy sabbath, and commandedst them precepts, statutes, and laws, by the hand of Moses thy servant:
Notwithstanding the children rebelled against me: they walked not in my statutes, neither kept my judgments to do them, which if a man do, he shall even live in them; they polluted my sabbaths: then I said, I would pour out my fury upon them, to accomplish my anger against them in the wilderness.
And in controversy they shall stand in judgment; and they shall judge it according to my judgments: and they shall keep my laws and my statutes in all mine assemblies; and they shall hallow my sabbaths.
Remember the sabbath day, to keep it holy.
Because they had not executed my judgments, but had despised my statutes, and had polluted my sabbaths, and their eyes were after their fathers’ idols.
Because they despised my judgments, and walked not in my statutes, but polluted my sabbaths: for their heart went after their idols.