The fourth commandment requires us to remember the Sabbath by setting apart one day in seven as holy to God. Initially, this pointed to God's rest from creation, but now it points to the rest which is found in the risen Christ.

Exodus 20:8–11

8 “Remember the Sabbath day, to keep it holy. 9 Six days you shall labor, and do all your work, 10 but the seventh day is a Sabbath to the LORD your God. On it you shall not do any work, you, or your son, or your daughter, your male servant, or your female servant, or your livestock, or the sojourner who is within your gates. 11 For in six days the LORD made the heavens and the earth, the sea, and all that is in them, and rested on the seventh day. Therefore the LORD blessed the Sabbath day and made it holy.

(ESV)