Shall surely be put to death; of which see an example, Numbers 15:32, &c. i.e. Servile work, as it is explained. Leviticus 23:7, &c.
Related Commentaries of Exodus 31:14
Exodus 31:14
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.