Exodus 31:16-17

Exodus 31:16-17 NASB1995

So the sons of Israel shall observe the sabbath, to celebrate the sabbath throughout their generations as a perpetual covenant.’ It is a sign between Me and the sons of Israel forever; for in six days the LORD made heaven and earth, but on the seventh day He ceased from labor, and was refreshed.”
NASB1995: New American Standard Bible - NASB 1995