Genesis 19:37

37.And the firstborn bare. This was a terrible blindness, that the daughters of Lot, shaking off all feeling of shame, raised up a memorial of their virtue, and through an eternal sign have exhibited their dishonor before their posterity. To their sons, or better, two nation in their persons, they give names, whence everybody can know that it was a family, originating from adultery and unchaste intercourse. The eldest boasts that she had obtained her son from her father, the other that her son was born of close relationship. Thus both unashamedly spread their crime, while they rather, through shame of their crime, had hidden themselves in eternal hideouts. Not content with the infamousness in their time, the propagate their crime into other times. Therefore, there is no doubt that they, enchanted by satan, have forgotten all difference between what is scandalous and honest. Paul says, (Romans 2:5,) that wicked, after a long pleasure in sinning, are at the end deprived of all feel of grief thereof. Such stupidity undoubtedly had caught those girls, because they did not shame themselves to spread their dishonor everywhere. Further, such an example of God’s punishment is revealed us, in order that we not allow any sin, and we will not lose ourselves in licentiousness, but that we, through fear of God, spur ourselves on to penitence.