'Sabbath day' in the Bible

At the same time saw I some treading wine presses on the Sabbath and bringing in clusters, and asses laden with wine, grapes, figs, and bringing all manner of burdens unto Jerusalem, upon the Sabbath day. And I rebuked them earnestly the same day that they sold the victuals.

Then reproved I the rulers in Judah, and said unto them, "What evil thing is this that ye do, and break the Sabbath day?

And it fortuned, that when the ports of Jerusalem began to be dark in the evening before the Sabbath, I commanded to shut the gates, and charged that they should not be opened till after the Sabbath: and some of my servants set I at the gates, that there should no burden be brought in on the Sabbath day.

And I said unto the Levites which were clean, that they should come and keep the gates, to hallow the Sabbath day. Think upon me, O my God, concerning this also, and spare me according to thy great mercy!