Genesis 2:2-3

And on the seventh day God ended His work which He had done; and He rested on the seventh day from all His work which He had done. [Heb. 4:9, 10.] And God blessed (spoke good of) the seventh day, set it apart as His own, and hallowed it, because on it God rested from all His work which He had created and done. [Exod. 20:11.]