'Sabbath' in the Bible

This is what you shall do: a third of you, of the priests and Levites who are resuming service on the Sabbath, shall be gatekeepers,

So the Levites and all Judah acted in accordance with everything that Jehoiada the priest had commanded; and every man took his men who were to resume duty on the Sabbath, with those who were to go off duty on the Sabbath, for Jehoiada the priest did not dismiss [any of] the divisions [from their duties].

to fulfill the word of the Lord by the mouth of Jeremiah, until the land had restored its Sabbaths; for as long as the land lay desolate it kept Sabbath until seventy years were complete.