Exodus 16:25-29

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.

Then the Lord said to Moses, “How long do you refuse to keep My commandments and My instructions?

See, the Lord has given you the Sabbath; for that reason He gives you bread for two days on the sixth day. Remain, everyone, in his place; no one is to leave his place on the seventh day.”