'Sabbath day' in the Bible

This it is therefore that ye shall do. The third part of you priests and Levites which come in the Sabbath day, shall keep the doors;

And the Levites and all Judah did in all things as Jehoiada the priest commanded, and took every man his men: both them that came in and them that went out the Sabbath day: for Jehoiada the priest did let none of the companies depart.