Genesis 1:6-8

New King James Version

⁶ Then God said, ^(A)“Let there be a ^[a]firmament in the midst of the waters, and let it divide the waters from the waters.” ⁷ Thus God made the firmament, ^(B)and divided the waters which were under the firmament from the waters which were ^(C)above the firmament; and it was so. ⁸ And God called the firmament Heaven. So the evening and the morning were the second day.