The Sabbath: Punishment of Those Who Profane
Source: TTT
Exodus 31:14, 15
Keep the Sabbath, for it is holy to you. Anyone who profanes it must surely be put to death. Whoever does any work on that day must be cut off from among his people. / For six days work may be done, but the seventh day is a Sabbath of complete rest, holy to the LORD. Whoever does any work on the Sabbath day must surely be put to death.
Numbers 15:32–36
While the Israelites were in the wilderness, a man was found gathering wood on the Sabbath day. / Those who found the man gathering wood brought him to Moses, Aaron, and the whole congregation, / and because it had not been declared what should be done to him, they placed him in custody.