'Sabbath of the Lord' in the Bible

Yea, if thou turn thy feet from the Sabbath, so that thou do not the thing which pleaseth thyself in my holy day: then shalt thou be called unto the pleasant, holy, and glorious Sabbath of the LORD, where thou shalt be in honor - so that thou do not after thine own imagination, neither seek thine own will, nor speak thine own words.