"Remember the Sabbath day, to keep it holy. Six days you shall labor and do all your work, but the seventh day is the Sabbath of the Lord your God. In it you shall do no work: you, nor your son, nor your daughter, nor your male servant, nor your female servant, nor your cattle, nor your stranger who is within your gates. 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 20:8-11

4.The fourth Commandment is about  

Sanctification and Relationship.  

God starts off the fourth Commandment with the word "Remember". This is because He knew we would forget it. God asks that we keep it set apart for Holy purposes so we can draw nearer to Him. The Fourth Commandment to remember the Sabbath concludes the section of the Ten Commandments that specifically helps define a proper relationship with God, how we are to love, worship and relate to Him. It explains why and when we need to take special time to draw closer to our Creator. It is also a special sign between us and God forever, that it is Him that sanctifies us Him alone we belong to and worship. The Sabbath, the seventh day of the week was set apart by God as a time of rest and spiritual rejuvenation. So why is this Commandment so frequently ignored, attacked and explained away by so many? Could it be because the challenges to the Sabbath Commandment are views generated by the ruler of this present evil world? After all, this being wants us to accept these views because he hates God's law. He does all he can to influence us to ignore, avoid and reason our way around it.Learn more
 source: www.the-ten-commandments.org  

Have a blessed day!  

 Commit to the LORD whatever you do,
   and your plans will succeed. -Proverbs 16:3