John Calvin's Bible Commentary
Exodus 16:14
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. For as to the idle talk of certain profane persons, (176) that the manna falls naturally in certain countries, who would thus display the force of their genius, as if they convicted Moses of falsehood, because he mightily extols a mere trifle, — it! is all an absurdity which may be easily refuted. It is indeed true, that in certain parts of the world they collect white grains, to which the name of manna has been vulgarly given, but (177) which one of the Rabbins will have to be Arabic; but it is neither a food, nor does it drop daily from the clouds, nor has it anything in common with this food, which the Prophet properly dignifies with the title of “angels’ food,” because God, who opens the bowels of the earth for the ordinary food of man, at that time made provision for the nourishment of His people from heaven. And that it may appear beyond a doubt that this food was then created miraculously, and contrary to the order of nature, these points are to be taken into consideration. First, It did not appear in the wilderness before the hour assigned by Moses in obedience to God’s command. Secondly, No change of weather prevented the manna from dropping in a regular measure; neither frost, nor rain, nor heat, nor winter, nor summer, interrupted the course of its distillation. Thirdly, A quantity sufficient for the immense multitude was found every day, when they took up an omer for every individual. Again, on the sixth day, the quantity was doubled, that they might lay by a second omer for their Sabbath food. Fifthly, If they preserved any beyond their due allowance, it was subject to putrefaction, whereas, on the Sabbath day, the second portion remained good. Sixthly, Wherever they were, this blessing of God always accompanied them, whilst the neighboring nations lived on corn, and the manna was only known in their camp. Seventhly, As soon as they entered a fruitful and corn-growing country, the manna ceased. Eighthly, That portion, which Moses was commanded to lay up in a vessel, did not grow corrupt. Let these points be well weighed, and the miracle will be more than sufficiently conspicuous, and will disperse all the clouds of objection by its intrinsic brightness.