Exodus 31:14,15
You shall keep the sabbath therefore; for it is holy to you: every one that defiles it shall surely be put to death: for whoever does any work therein, that soul shall be cut off from among his people.
Torrey's Topical Textbook—AKJV

Numbers 15:32-36
And while the children of Israel were in the wilderness, they found a man that gathered sticks on the sabbath day.
Torrey's Topical Textbook—AKJV