When the layer of dew had evaporated, there were thin flakes on the desert floor, as fine as frost on the ground.
14. And when the dew that lay was gone up. The shape of the manna is here briefly described, viz., that it was like the dew condensed into small round grains. Its taste will be also mentioned elsewhere; but here it was sufficient to show, that this fecundity was not natural, but miraculously given to the clouds, so that they should daily rain manna.
Now they begin to be provided for by the immediate hand of God. I. He makes them a feast, at night, of delicate fowl, feathered fowl (Psa 78:27), therefore not locusts, as some think; quails, or pheasants, or some wild fowl, came up, and covered the camp, so tame that they might take up as many of them as they pleased.
Commenting on Exodus 16:13-21
And when the dew that lay was gone up,.... Exhaled by the sun upon the rising of it: behold, upon the face of the wilderness; upon the surface of it, all around the camp of Israel: there lay a small round thing, as small as the hoar frost on the ground; which is what is in the next verse called "manna".