Exodus 35:2-3 Ex. 35:2-3
2 Six days shall work be done, but on the seventh day there shall be to you an holy day, a sabbath of rest to the LORD: whosoever doeth work therein shall be put to death. 3 Ye shall kindle no fire throughout your habitations upon the sabbath day.
Ezekiel 20:12 Ezek. 20:12
Moreover also I gave them my sabbaths, to be a sign between me and them, that they might know that I am the LORD that sanctify them.
(Relation)