(Genesis 1: 11-19)
And God said: «Let the earth put forth vegetation, plants yielding seed, and fruit trees bearing fruit in which is their seed... » And it was so (Genesis 1: 11)... And God saw that it was good. And there was evening and there was morning, a third day (Genesis 1: 13) ... God made the two great lights, the greater lighter to rule the day and the lesser light to rule the night; he made the stars also (Genesis 1: 16)... And God saw that it was good. And there was evening and there was morning, a fourth day. (Genesis 1: 19)
Michelangelo shows the third and fourth day of the Creation simultaneously. On the left, in fact, God, seen from behind, extends his arm towards a bush, alluding to the vegetable world. On the right, the majestic figure of the Lord reappears while, with an imperious gesture of his hands, he points and divides the sun and moon in the heavens.