Psalms 121:6King James Version

Genesis 1:5

And God called the light Day, and the darkness he called Night. And the evening and the morning were the first day.

Genesis 1:14

And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years:

Genesis 1:16

And God made two great lights; the greater light to rule the day, and the lesser light to rule the night: he made the stars also.

Genesis 1:18

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.

Genesis 7:4

For yet seven days, and I will cause it to rain upon the earth forty days and forty nights; and every living substance that I have made will I destroy from off the face of the earth.