Irenaeus : For Lot, not acting under the impulse of his own will, nor at the prompting of carnal concupiscence, nor having any knowledge or thought of anything of the kind, did [in fact] work out a type [of future events]. As says the Scripture: "And that night the elder went in and lay with her father; and Lot knew not when she lay down, nor when she arose." And the same thing took place in the case of the younger: "And he knew not," it is said, "when she slept with him, nor when she arose." Since, therefore, Lot knew not [what he did], nor was a slave to lust [in his actions], the arrangement [designed by God] was carried out, by which the two daughters (that is, the two churches), who gave birth to children begotten of one and the same father, were pointed out, apart from [the influence of] the lust of the flesh. For there was no other person, [as they supposed], who could impart to them quickening seed, and the means of their giving birth to children, as it is written... — Irenaeus Against Heresies Book 4 Jerome : (Versed. 36 seqq.) And the two daughters of Lot conceived by their father, and the firstborn son was born and she called his name Moab. He is the father of the Moabites to this day. And the younger, she also gave birth to a son, and she called his name Ammon, that is, son of my people. He is the father of the Ammonites. The name Moab means 'from the father' and has its etymology in it. But Ammon, whose name is given as if a cause, is derived as son of my race, or as it is better in Hebrew (), son of my people, so it is derived partly from the meaning of the name, partly from the language itself: Ammi, from whom the Ammonites are called, means my people. — Hebrew Questions on Genesis