Q.67: What are the reasons annexed to the fourth commandment?
A. The reasons annexed to the fourth commandment, are God’s allowing us six days of the week for our own lawful employments, His challenging a special propriety in a seventh, His own example, and His blessing the Sabbath day.
For in six days the LORD made the heavens and the earth, the sea, and all that is in them, and rested the seventh day. Therefore the LORD blessed the Sabbath day and hallowed it. Exodus 20:11