"14. And God said: Let there be lights made in the firmament of heaven, to divide the day and the night, and let them be for signs and for seasons, and for days and years: 15. to shine in the firmament of heaven, and to give light upon the earth. And it was so."
"I say: God on this fourth day rarefied one part of the heavens, in order to condense another, namely that luminous substance which was created on the first day and called light, verse 3"