Exodus 16:26

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.’”

They laid it up until the morning, as Moses ordered, and it didn’t become foul, and there were no worms in it.

Moses said, “Eat that today, for today is a Sabbath to the LORD. Today you shall not find it in the field.

On the seventh day, some of the people went out to gather, and they found none.

The LORD said to Moses, “How long do you refuse to keep my commandments and my laws?

Behold, because the LORD has given you the Sabbath, therefore he gives you on the sixth day the bread of two days. Everyone stay in his place. Let no one go out of his place on the seventh day.”