Genesis 19:1

1.And there came two angels to Sodom. The question occurs, why one of the three angels has suddenly disappeared, and two only are come to Sodom? The Jews (with their wonted audacity in introducing fables) pretend that one came to destroy Sodom, the other to preserve Lot. But from the discourse of Moses, this appears to be frivolous: because we shall see that they both assisted in the liberation of Lot. What I have before adduced is more simple; namely, that it was granted to Abraham, as a peculiar favor, that God would not only send him two messengers from the angelic host, but that, in a more familiar manner, he would manifest himself to him, in his own Son. For (as we have seen) one of the messengers held the principal place, as being superior to the others in dignity. Now, although Christ was always the Mediator, yet, because he manifested himself more obscurely to Lot than he did to Abraham, the two angels only came to Sodom. Since Moses relates, that Lot sat in the gate of the city about evening, many contend that he did so, according to daily custom, for the purpose of receiving guests into his house; yet, as Moses is silent respecting the cause, it would be rash to affirm this as certain. I grant, indeed, that he did not sit as idle persons are wont to do; but the conjecture is not less probable, that he had come forth to meet his shepherds, in order to be present when his sheep were folded. That he was hospitable, the courteous invitation which is mentioned by Moses clearly demonstrates; yet, why he then remained in the gate of the city is uncertain; unless it were, that he was unwilling to omit any opportunity of doing an act of kindness, when strangers presented themselves on whom he might bestow his services. What remains, on this point, may be found in the preceding chapter Genesis 17:1