well as by the turtle-dove and pigeon. And it is said, “But the birds divided he not,” because carnal men are divided among themselves, but the spiritual not at all, whether they seclude themselves from the busy conversation of men, like the turtle-dove, or dwell among them, like the pigeon; for both birds are simple and harmless, signifying that even in the Israelite people, to which that land was to be given, there would be individuals who were children of the promise, and heirs of the kingdom that is to remain in eternal felicity. But the fowls coming down on the divided carcasses represent nothing good, but the spirits of this air, seeking some food for themselves in the division of carnal men. But that Abraham sat down with them, signifies that even amid these divisions of the carnal, true believers shall persevere to the end. And that about the going down of the sun great fear fell upon Abraham and a horror of great darkness, signifies that about the end of this world believers shall be in great perturbation and tribulation, of which the Lord said in the gospel, “For then shall be great tribulation, such as was not from the beginning.”
But what is said to Abraham, “Know of a surety that thy seed shall be a stranger in a land not theirs, and they shall reduce them to servitude, and shall afflict them 400 years,” is most clearly a prophecy about the people of Israel which was to be in servitude in Egypt. Not that this people was to be in that servitude under the oppressive Egyptians for 400 years, but it is foretold that this should take place in the course of those 400 years. For as it is written of Terah the father of Abraham, “And the days of Terah in Haran were 205 years,” not because they were all spent there, but because they were completed there, so it is said here also, “And they shall reduce them to servitude, and shall afflict them 400 years,” for this reason, because that number was completed, not because it was all spent in that affliction. The years are said to be 400 in round numbers, although they were a little more,–whether you reckon from this time, when these things were promised to Abraham, or from the birth of Isaac, as the seed of Abraham, of which these things are predicted. For, as we have already said above, from the seventy-fifth year of Abraham, when the first promise was made to him, down to the exodus of Israel from Egypt, there are reckoned 430 years, which the apostle thus mentions: “And this I say, that the covenant confirmed by God, the law, which was made 430 years after, cannot disannul, that it should make the promise of none effect.” So then these 430 years might be called 400, because they are not much more, especially since part even of that number had already gone by when these things were shown and said to Abraham in vision, or when Isaac was born in his father’s 100th year, twenty-five years after the first promise, when of these 430 years there now remained 405, which God was pleased to call 400. No one will doubt that the other things which follow in the prophetic words of God pertain to the people of Israel.