How is the Sabbath to be sanctified?

The Sabbath is to be sanctified by a holy resting all that day (Exodus 20:8,10), even from such worldly employments and recreations as are lawful on other days (Exodus 16:25-28; Nehemiah 13:15-22); and spending the whole time in the public and private exercises of God's worship (Luke 4:16; Acts 20:7; Psalm 92 title; Isaiah 66:23), except so much as is to be taken up in the works of necessity and mercy (Matthew 12:1-13).