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 26:9

26:9 You are to join five curtains by themselves and six curtains by themselves. You are to double over the sixth curtain at the front of the tent.