Genesis 1:4-6

Revised Standard Version Catholic Edition

⁴ And God saw that the light was good; and God separated the light from the darkness. ⁵ God called the light Day, and the darkness he called Night. And there was evening and there was morning, one day.

⁶ And God said, “Let there be a firmament in the midst of the waters, and let it separate the waters from the waters.”