Exodus 16:14-18

14And when the dew that lay [round it] was gone up, behold, on the face of the wilderness there was [something] fine, granular, fine as hoar-frost, on the ground.

15And the children of Israel saw [it], and said one to another, What is it? for they did not know what it was. And Moses said to them, This is the bread which Jehovah has given you to eat.

16This is the thing which Jehovah has commanded: Gather of it every man according to what he can eat, an omer a poll, [according to] the number of your persons: ye shall take every man for those that are in his tent.

17And the children of Israel did so, and gathered, some much, some little.

18And they measured with the omer: then he that gathered much had nothing over, and he that gathered little wanted nothing: they had gathered every man according to the measure of his eating.