Antiquities of the Jews - Book I
1. In the beginning God created the heaven and the earth. But when the earth did not come into sight, but was covered with thick darkness, and a wind moved upon its surface, God commanded that there should be light: and when that was made, he considered the whole mass, and separated the light and the darkness; and the name he gave to one was Night, and the other he called Day: and he named the beginning of light, and the time of rest, The Evening and The Morning, and this was indeed the first day. But Moses said it was one day; the cause of which I am able to give even now; but because I have promised to give such reasons for all things in a treatise by itself, I shall put off its exposition till that time. After this, on the second day, he placed the heaven over the whole world, and separated it from the other parts, and he determined it should stand by itself. He also placed a crystalline [firmament] round it, and put it together in a manner agreeable to the earth, and fitted it for giving moisture and rain, and for affording the advantage of dews.