'Sabbath' in the Bible

Bring no more vain oblations; incense is an abomination unto me; new moon and sabbath, the calling of assemblies,- I cannot away with iniquity and the solemn meeting.

Blessed is the man that doeth this, and the son of man that holdeth it fast; that keepeth the sabbath from profaning it, and keepeth his hand from doing any evil.

Also the foreigners that join themselves to Jehovah, to minister unto him, and to love the name of Jehovah, to be his servants, every one that keepeth the sabbath from profaning it, and holdeth fast my covenant;

If thou turn away thy foot from the sabbath, from doing thy pleasure on my holy day; and call the sabbath a delight, and the holy of Jehovah honorable; and shalt honor it, not doing thine own ways, nor finding thine own pleasure, nor speaking thine own words:

And it shall come to pass, that from one new moon to another, and from one sabbath to another, shall all flesh come to worship before me, saith Jehovah.