Exodus 16:28

Six days ye shall gather it; but on the seventh day, which is the sabbath, in it there shall be none.

And it came to pass, that there went out some of the people on the seventh day for to gather, and they found none.

See, for that the LORD hath given you the sabbath, therefore he giveth you on the sixth day the bread of two days; abide ye 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.