Exodus 16:13-15
13
It happened at evening that quail came up and covered the camp; and in the morning the dew lay around the camp.
14
When the dew that lay had gone, behold, on the surface of the wilderness was a small round thing, small as the frost on the ground.
15
When the children of Israel saw it, they said one to another, "What is it?" For they didn't know what it was. Moses said to them, "It is the bread which Yahweh has given you to eat."