John Chrysostom

And why doth He not make it of things that are not? Stopping the mouth of Marcion, and of Manichaeans, who alienate His creation from Him, and teaching by His very works, that even all the things that are seen are His works and creatures, and signifying that it is Himself who gives the fruits, who said at the beginning, "Let the earth put forth the herb of grass," and "Let the waters bring forth things moving with living souls."

For this is not at all a less work than the other. For though those were made of things that are not, yet nevertheless were they of water; and it was no greater thing to produce fruits out of the earth, and moving things with life out of the water, than out of five loaves to make so many; and of fishes again, which was a sign that He was ruler both of the earth and of the sea.