Exodus 16:5

16:5 On the sixth day they will prepare what they bring in, and it will be twice as much as they gather every other day.”

Exodus 16:22

16:22 And on the sixth day they gathered twice as much food, two omers per person; and all the leaders of the community came and told Moses.

Exodus 16:29

16:29 See, because the Lord has given you the Sabbath, that is why he is giving you food for two days on the sixth day. Each of you stay where you are; let no one go out of his place on the seventh day.”