Exodus 31:15
15For six days work may be done but the seventh day is a Sabbath of complete rest, holy to AO. Whoever does [any] work on the Sabbath day must surely be put to death.
15For six days work may be done but the seventh day is a Sabbath of complete rest, holy to AO. Whoever does [any] work on the Sabbath day must surely be put to death.