Exodus 16:15-16

15When the Israelites saw these pieces, they said, ‘What is it?’ They did not understand what it was. But Moses said to them, ‘This is the bread that the Lord has given to you. It is for you to eat.

16This is what the Lord has commanded: “Each family must pick up as much as they need to eat. Pick up two litres for each person who lives in your tent.” ’