Exodus 16:27

24 And they kept it till the morning as Moses had said: and no smell came from it, and it had no worms.

25 And Moses said, Make your meal today of what you have, for this day is a Sabbath to the Lord: today you will not get any in the fields.

26 For six days you will get it, but on the seventh day, the Sabbath, there will not be any.

27 But still on the seventh day some of the people went out to get it, and there was not any.

28 And the Lord said to Moses, How long will you go against my orders and my laws?

29 See, because the Lord has given you the Sabbath, he gives you on the sixth day bread enough for two days; let every man keep where he is; let no man go out of his place on the seventh day.

30 So the people took their rest on the seventh day.