Augustine of Hippo — on Gen 1:9 (ON THE LITERAL INTERPRETATION OF GENESIS 2.11.24)

“Hence, at the words "Let the waters be gathered together, and let dry land appear," these two things [earth and water] received their proper forms familiar to us and perceived by our senses, water being made fluid and earth solid. Of water, therefore, it is said, "Let it be gathered"; of earth, "Let it appear." For water tends to ebb and flow, but earth remains immobile.”