Ezekiel 20:12, 20-21

And I also gave them my Sabbaths as a sign between me and them so that they might know that I, YAHWEH, am the one who sets them apart as my own.

Keep my Sabbaths as holy days. Let them be a covenant-sign between me and you, to remind you that I am YAHWEH your God.’ “However, like their parents, the next generation rebelled against me; they refused to keep my laws and did not respect or practice my standard of justice so that they would follow my laws and live by them. They also dishonored my Sabbaths. So, in my fury I decided to punish them and pour out my anger on them in the desert.