EDIT: Okay, I looked it up.
Here is St Augustine
AUGUSTINE AND EVOLUTION - A STUDY IN THE SAINT’S DE GENESI AD LITTERAM AND DE TRINITATE BY HENRY WOODS, S. J.
…Such prime matter, nevertheless, can exist only under some form. “We must not think of God as first creating matter,” the Saint admonishes, “and after an interval of time giving form to what He had created without form; but as creating it simultaneously with the world. As spoken words are produced by the speaker, not by giving form afterwards to a voice previously without form, but by uttering his voice fully formed, so we must understand that God did indeed create the world from unformed matter, yet concreated this matter simultaneously with the world. Still not uselessly do we tell, first that from which something is made, and afterwards what is made from it; because, though both can be made simultaneously, they can not be narrated simultaneously.”23 This we find again in the treatise we are especially discussing. “When we say matter and form, we understand both simultaneously, though we cannot pronounce them simultaneously. As in the brief space of speaking we pronounce one before the other, so in the longer time of narration we discuss one before the other. Still God created both simultaneously, while we in our speech take up first in time what is first in origin only.”24
Prime matter can be called not only what it actually was under some elementary form, but also what it was to become by future formation. This most important principle St. Augustine lays down in explaining against the Manicheans the text: “In the beginning God created heaven and earth.” He says: “Unformed matter is here called heaven and earth, not because it was this, but because it was able to become this; for heaven, it is written, was made afterwards. For if, considering a seed, we say that roots and wood and branches and fruit and leaves are there, not because they are there now, but because they are to be from it, in the same way it is said, ‘In the beginning God made heaven and earth,’ as if he made the seed of heaven and earth, when the matter of heaven and earth was still confused. But, because heaven and earth were certainly to be from it, matter itself is already called heaven and earth. Our Lord Himself uses this manner of speech when He says: ‘I will not now call you servants, because the servant knows not what his master does. But I have called you friends, because all things whatsoever I have heard from the Father, I have made known to you.’25 Not that he had actually done so as yet, but because the manifestation was certainly to take place.”26
and…
27 In the beginning, therefore, God created prime matter with its potency positively determined to all things that were to be, so that these things may be said literally, not figuratively, to have been created simultaneously with it.
