Exodus 16:21-23

They gathered it morning by morning, every man as much as he should eat; but when the sun grew hot, it would melt. Now on the sixth day they gathered twice as much bread, two omers for each one. When all the leaders of the congregation came and told Moses, 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.”