Genesis 1:7 in the World English Bible
God made the expanse, and divided the waters which were under the expanse from the waters which were above the expanse; and it was so.
Context
6 And God said, Let there be a firmament in the midst of the waters, and let it divide the waters from the waters.
7 And God made the firmament, and divided the waters which were under the firmament from the waters which were above the firmament: and it was so.
8 And God called the firmament Heaven. And the evening and the morning were the second day.