Genesis 1:4; Genesis 1:6; Genesis 1:7; Genesis 1:14; Genesis 1:18

4 God saw that the light was good; and God separated the light from the darkness.

6 Then God said, "Let there be an expanse in the midst of the waters, and let it separate the waters from the waters."

7 God made the expanse, and separated the waters which were below the expanse from the waters which were above the expanse; and it was so.

14 Then God said, "Let there be lights in the expanse of the heavens to separate the day from the night, and let them be for signs and for seasons and for days and years;

18 and to govern the day and the night, and to separate the light from the darkness; and God saw that it was good.