Exodus 16:26-30
Six days you shall gather it, but on the seventh day, the sabbath, there will be none.” 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; therefore He gives you bread for two days on the sixth day. Remain every man in his place; let no man go out of his place on the seventh day.” So the people rested on the seventh day.