30 Then Lot went up out of Zoar and dwelt in the mountains, and his two daughters were with him; for he was afraid to dwell in Zoar. And he and his two daughters dwelt in a cave. 31 Now the firstborn said to the younger, "Our father is old, and there is no man on the earth to come in to us as is the custom of all the earth. 32 Come, let us make our father drink wine, and we will lie with him, that we may preserve the lineage of our father." 33 So they made their father drink wine that night. And the firstborn went in and lay with her father, and he did not know when she lay down or when she arose. 34 It happened on the next day that the firstborn said to the younger, "Indeed I lay with my father last night; let us make him drink wine tonight also, and you go in and lie with him, that we may preserve the lineage of our father." 35 Then they made their father drink wine that night also. And the younger arose and lay with him, and he did not know when she lay down or when she arose. 36 Thus both the daughters of Lot were with child by their father. 37 The firstborn bore a son and called his name Moab; he is the father of the Moabites to this day. 38 And the younger, she also bore a son and called his name Ben-Ammi; he is the father of the people of Ammon to this day.
Matthew Henry's Commentary on Genesis 19:30-38
Commentary on Genesis 19:30-38
(Read Genesis 19:30-38)
See the peril of security. Lot, who kept chaste in Sodom, and was a mourner for the wickedness of the place, and a witness against it, when in the mountain, alone, and, as he thought, out of the way of temptation, is shamefully overtaken. Let him that thinks he stands high, and stands firm, take heed lest he fall. See the peril of drunkenness; it is not only a great sin itself, but lets in many sins, which bring a lasting wound and dishonour. Many a man does that, when he is drunk, which, when he is sober, he could not think of without horror. See also the peril of temptation, even from relations and friends, whom we love and esteem, and expect kindness from. We must dread a snare, wherever we are, and be always upon our guard. No excuse can be made for the daughters, nor for Lot. Scarcely any account can be given of the affair but this, The heart is deceitful above all things, and desperately wicked: who can know it? From the silence of the Scripture concerning Lot henceforward, learn that drunkenness, as it makes men forgetful, so it makes them to be forgotten.