GENESIS 1:1, 6-8 (KJV)

¹In the beginning God created the heaven and the earth.

⁶And God said, Let there be a firmament in the midst of the waters, and let it divide the waters from the waters. ⁷And 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. ⁸And God called the firmament Heaven. And the evening and the morning were the second day.