Exodus 16:23-27

then he said to them, “This is what the Lord meant: Tomorrow is a Sabbath observance, a holy Sabbath to the Lord. Bake what you will bake and boil what you will boil, and all that is left over put aside to be kept until morning.”

So they put it aside until morning, as Moses had ordered, and it did not stink nor was there a maggot in it.

Then Moses said, “Eat it today, for today is a Sabbath to the Lord; today you will not find it in the field.

Six days you shall gather it, but on the seventh day, the Sabbath, there will be none.”

Yet it came about on the seventh day that some of the people went out to gather, but they found none.