The Fourth Day

And God said, Let there be lights in the firmament of the heaven, to give light on earth, to divide the day from the night; and let them be for signs, and for seasons, and for days, and for years; and let them be for lights in the firmament of the heaven, to give light upon the earth: and it was so. 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. And God set them in the firmament of the heaven to give light upon the earth, 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. And the evening and the morning were the fourth day.

Genesis 1:14-19

He being the Power of God and Wisdom of God causes the heaven to revolve, and has suspended the earth, and made it fast, though resting upon nothing, by His own nod. Illumined by Him, the sun gives light to the world, and the moon has her measured period of shining.

Athanasius of Alexandria, Against the Heathen §40

Scripture as St Theophilus of Antioch sets it down in To Autolycus. Both texts are from the Forge library.