'Sabbath Day' in the Bible

Thus saith Jehovah, Take heed to yourselves, and bear no burden on the sabbath day, nor bring it in by the gates of Jerusalem;

neither carry forth a burden out of your houses on the sabbath day, neither do ye any work: but hallow ye the sabbath day, as I commanded your fathers.

And it shall come to pass, if ye diligently hearken unto me, saith Jehovah, to bring in no burden through the gates of this city on the sabbath day, but to hallow the sabbath day, to do no work therein;

But if ye will not hearken unto me to hallow the sabbath day, and not to bear a burden and enter in at the gates of Jerusalem on the sabbath day; then will I kindle a fire in the gates thereof, and it shall devour the palaces of Jerusalem, and it shall not be quenched.