Genesis 1:7-9

7And God made the expanse [of sky] and separated the waters which were under the expanse from the waters which were above the expanse; and it was so [just as He commanded].

8God called the expanse [of sky] heaven. And there was evening and there was morning, a second day.

9Then God said, “Let the waters below the heavens be gathered into one place [of standing, pooling together], and let the dry land appear”; and it was so.