Exodus 16:23
23 And he said to them, “This is what Yahweh has spoken: Tomorrow is a sabbath observance, a holy sabbath to Yahweh. Bake what you will bake and boil what you will boil, and all that is in excess put aside to be kept until morning.”
Exodus 16:25 - 16:26
25 And Moses said, “Eat it today, for today is a sabbath to Yahweh; today you will not find it in the field. 26 Six days you shall gather it, but on the seventh day, the sabbath, there will be none.”
Exodus 16:29 - 16:30
29 See, Yahweh 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.” 30 So the people rested on the seventh day.