Exodus 16:13-18

13And it came to pass at even, that the quails came up, and covered the camp: and in the morning the dew lay round about the camp.

14And when the dew that lay was gone up, behold, upon the face of the wilderness a small round thing, small as the hoar frost on the ground.

15And when the children of Israel saw it, they said one to another, What is it? for they wist not what it was. And Moses said unto them, It is the bread which the LORD hath given you to eat.

16This is the thing which the LORD hath commanded, Gather ye of it every man according to his eating; an omer a head, according to the number of your persons, shall ye take it, every man for them which are in his tent.

17And the children of Israel did so, and gathered some more, some less.

18And when they did mete it with an omer, he that gathered much had nothing over, and he that gathered little had no lack; they gathered every man according to his eating.