Deuteronomy 5:12
Observe the Sabbath day, to keep it holy, as LORD thy God commanded thee.
Exodus 20:8-11
Remember the Sabbath day, to keep it holy.
Isaiah 56:6
Also the foreigners who join themselves to LORD, to minister to him, and to love the name of LORD, to be his servants, everyone who keeps the Sabbath from profaning it, and holds fast my covenant,
Isaiah 58:13
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 LORD honorable, and shall honor it, not doing thine own ways, nor finding thine own pleasure, no
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