Genesis 1:6-8

Revised Standard Version Catholic Edition

⁶ And God said, “Let there be a firmament in the midst of the waters, and let it separate the waters from the waters.” ⁷ And God made the firmament and separated 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 there was evening and there was morning, a second day.