Numbers 15:32
While the children of Israel were in the wilderness, they found a man gathering sticks on the Sabbath day.
Exodus 35:2-3
'Six days shall work be done, but on the seventh day there shall be a holy day for you, a Sabbath of solemn rest to the LORD: whoever does any work in it shall be put to death.
Exodus 16:23
He said to them, "This is that which the LORD has spoken, 'Tomorrow is a solemn rest, a holy Sabbath to the LORD. Bake that which you want to bake, and boil that which you want to boil; and all that remains over lay up for yourselves to be kept until the morning.'"
Exodus 16:27-28
It happened on the seventh day, that some of the people went out to gather, and they found none.
Exodus 20:8-10
"Remember the Sabbath day, to keep it holy.
Exodus 31:14-15
You shall keep the Sabbath therefore; for it is holy to you. Everyone who profanes it shall surely be put to death; for whoever does any work therein, that soul shall be cut off from among his people.