Cosmas Indicopleustes, on Gen 1:1

“In the beginning God created heaven, and earth.”

“For on the first day He made the matter out of which things were created; but on the other days He gave their form and arrangement to the things created. For example, He made the heaven which was before non-existent—not this visible heaven, but the one above it, for the visible was made on the second day. God made the higher heaven—the heaven of heavens to the Lord, and it is higher than this visible heaven, and, as in a house of two stories, between it and the earth another heaven is interposed. God having thus created the world as one house, placed this visible heaven as a roof in the middle, and the waters above it. Wherefore, David says: Who covereth his upper chambers with waters. God then made the heaven when it was not, the earth when it was not, the abysses when they were not, and wind, air, fire, water; of all the things that came into existence He made their matter on the first day.”

Imported from an open dataset — not yet checked against the printed edition.