nkjv Exodus:31:16-17
nkjv@Exodus:31:16 @ Therefore the children of Israel shall keep the Sabbath, to observe the Sabbath throughout their generations as a perpetual covenant.
nkjv@Exodus:31:17 @ It is a sign between Me and the children of Israel forever; for in six days the LORD made the heavens and the earth, and on the seventh day He rested and was refreshed."'