Exodus 20:8-11

8 aRemember the Sabbath day, to keep it holy. 9 bSix days you shall labor, and do all your work, 10but the cseventh day is a Sabbath to the Lord your God. On it you shall not do any work, you, or your son, or your daughter, your male servant, or your female servant, or your livestock, or the dsojourner who is within your gates. 11For ein six days the Lord made heaven and earth, the sea, and all that is in them, and rested on the seventh day. Therefore the Lord blessed the Sabbath day and made it holy.

Isaiah 56:6

6 “And fthe foreigners who join themselves to the Lord,
to minister to him, to love the name of the Lord,
and to be his servants,
everyone gwho keeps the Sabbath and does not profane it,
and holds fast my covenant

Isaiah 58:13

13 hIf you turn back your foot from the Sabbath,
from doing your pleasure
Or business
on my holy day,
and call the Sabbath a delight
and the holy day of the Lord honorable;
if you honor it, not going your own ways,
or seeking jyour own pleasure,
Or pursuing your own business
or talking idly;
Hebrew  or speaking a word

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