Exodus 16:22-23

22On the sixth day, they gathered twice as much as usual—four quarts for each person instead of two. Then all the leaders of the community came and asked Moses for an explanation.

23He told them, “This is what the Lord commanded: Tomorrow will be a day of complete rest, a holy Sabbath day set apart for the Lord. So bake or boil as much as you want today, and set aside what is left for tomorrow.”