Exodus 16:23-28

And he said unto them, This is that which Jehovah hath spoken, To-morrow is a solemn rest, a holy sabbath unto Jehovah: bake that which ye will bake, and boil that which ye will boil; and all that remaineth over lay up for you to be kept until the morning. And they laid it up till the morning, as Moses bade: and it did not become foul, neither was there any worm therein. And Moses said, Eat that to-day; for to-day is a sabbath unto Jehovah: to-day ye shall not find it in the field. Six days ye shall gather it; but on the seventh day is the sabbath, in it there shall be none. And it came to pass on the seventh day, that there went out some of the people to gather, and they found none. And Jehovah said unto Moses, How long refuse ye to keep my commandments and my laws?