Remember the sabbath day, to keep it holy.
Exodus 20:8
"Just as consecrated priests have access to the holy sanctuary in space (e.g., Leviticus 8; Numbers 18), all Israelites enjoy access to the holy temple in time—the Sabbath—because God 
It is not the Israelites’ own Sabbath rest that sanctifies them. Rather, the Lord Himself did this. Their Sabbath observance signified that they accept His gift of holiness. The free nature of the gift is emphasized by the fact that its sign—the Sabbath—involves no work. To the contrary, it is refreshing rest from work." Roy Gane