Exodus 16:20

The children of Israel did so, and some gathered more, some less.

When they measured it with an omer, he who gathered much had nothing over, and he who gathered little had no lack. They each gathered according to his eating.

Moses said to them, “Let no one leave of it until the morning.”

They gathered it morning by morning, everyone according to his eating. When the sun grew hot, it melted.

On the sixth day, they gathered twice as much bread, two omers for each one; and all the rulers of the congregation came and told Moses.

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.’”