Exodus 12:16

12:16 On the first day there will be a holy convocation, and on the seventh day there will be a holy convocation for you. You must do no work of any kind on them, only what every person will eat – that alone may be prepared for you.

Exodus 16:23

16:23 He said to them, “This is what the Lord has said: ‘Tomorrow is a time of cessation from work, a holy Sabbath to the Lord. Whatever you want to bake, bake today; whatever you want to boil, boil today; whatever is left put aside for yourselves to be kept until morning.’”

Numbers 15:32-36

15:32 When the Israelites were in the wilderness they found a man gathering wood on the Sabbath day. 15:33 Those who found him gathering wood brought him to Moses and Aaron and to the whole community. 15:34 They put him in custody, because there was no clear instruction about what should be done to him. 15:35 Then the Lord said to Moses, “The man must surely be put to death; the whole community must stone him with stones outside the camp.” 15:36 So the whole community took him outside the camp and stoned him to death, just as the Lord commanded Moses.

Isaiah 58:13

58:13 You must observe the Sabbath

rather than doing anything you please on my holy day.

You must look forward to the Sabbath

and treat the Lord’s holy day with respect.

You must treat it with respect by refraining from your normal activities,

and by refraining from your selfish pursuits and from making business deals.