Genesis 1:18-20
Genesis 1: 18 to 20
18 and to rule over the day and over the night and to divide the light from the darkness; and God saw that [it was] good.
19 And the evening and the morning were the fourth day.
20 And God said, Let the waters bring forth great quantities of creatures with living souls and fowl [that] may fly above the earth upon the face of the firmament of the heavens.