““Remember to observe the Sabbath day by keeping it holy. 9 You have six days each week for your ordinary work, 10 but the seventh day is a Sabbath day of rest dedicated to the Lord your God. On that day no one in your household may do any work. This includes you, your sons and daughters, your male and female servants, your livestock, and any foreigners living among you. 11 For in six days the Lord made the heavens, the earth, the sea, and everything in them; but on the seventh day he rested. That is why the Lord blessed the Sabbath day and set it apart as holy.”
The Sabbath is not introduced as a new institution here in the 10 commandments but with the word “remember” - referring back to the very first week of earths history. It is to be remembered and observed as the memorial of the Creator’s work. Kept as a “Park in Time” Pointing to God as the the maker of the heavens and the earth, it distinguishes the true God from all false gods in action and status. All who keep the seventh day holy (set apart) signify by this act that they are worshipers of Jehovah. So this act can be seen as allegiance to the God.
God has given men six days to work and take care of business (busyness), and He requires that their own work be done in the six working days. Acts of necessity and mercy are to be done on the Sabbath, the sick and suffering are at all times to be cared for (though the carers should also take time off); but unnecessary labor is to be avoided.
“Keep the Sabbath day holy.
Don’t pursue your own interests on that day,
but enjoy the Sabbath
and speak of it with delight as the Lord’s holy day.
Honor the Sabbath in everything you do on that day,
and don’t follow your own desires or talk idly.