John Gills Exposition of the Bible Commentary - Genesis 19:36
Thus were both the daughters of Lot with child by their father. We learn from hence what the best of men are when left to themselves; a good man, a righteous Lot, is guilty of crimes the most shocking; he exposed the chastity of his daughters to the men of Sodom, and now his daughters attacked him, and succeeded, being both with child by him; and this brought about by excessive drinking, a sin which often leads on to the foulest crimes, and therefore to be carefully avoided; these sins Lot... read more
Matthew Henry's Complete Commentary - Genesis 19:30-38
Here is, I. The great trouble and distress that Lot was brought into after his deliverance, Gen. 19:30. 1. He was frightened out of Zoar, durst not dwell there; probably because he was conscious to himself that it was a refuge of his own choosing and that herein he had foolishly prescribed to God, and therefore he could not but distrust his safety in it; or because he found it as wicked as Sodom, and therefore concluded it could not long survive it; or perhaps he observed the rise and increase... read more