And delivered just Lot - Genesis 19:16. This case is incidentally referred to, to show that God makes a distinction between the righteous and the wicked; and that while the latter will be destroyed, the former will be saved. See 2-Peter 2:9. Lot is called "just," because he preserved himself uncontaminated amidst the surrounding wickedness. As long as he lived in Sodom he maintained the character of an upright and holy man.
Vexed with the filthy conversation of the wicked - By the corrupt and licentious conduct of the wicked around him. On the word "conversation," see the notes at Philippians 1:27. The original phrase, which is rendered "filthy," has reference to licentiousness. The corruption of Sodom was open and shameless; and as Lot was compelled to see much of it, his heart was pained. The word here rendered "vexed," means that he was wearied or burdened. The crimes of those around him he found it hard to bear with.

Vexed with the filthy conversation - Καταπονουμενον ὑπο της των αθεσμων εν ασελγεια αναστροφης· Being exceedingly pained with the unclean conduct of those lawless persons. What this was, see in the history, Genesis 19., and the notes there.

And delivered just Lot,.... Who was a just man, being justified by the righteousness of Christ imputed to him; and having the new man formed in him, which is created in righteousness and true holiness; and living soberly, righteously, and godly, though not without sin: for there is not a just man that lives and sinneth not; this righteous man was delivered from the burning of Sodom by the means of angels, Genesis 19:16. The Jews are very injurious to this good man's character, and give a very different one of him from this of the apostle's; they call him a wicked man, a perfect wicked man, as wicked as the inhabitants of Sodom (d); and say, that because they abounded in sin, therefore Lot chose to dwell among them (e); and affirm (f), that all the time he was with Abraham, God did not join himself to him, and did not commune with Abraham on his account; but, when he was separated from him, did; they call him the evil imagination, and the old serpent that was accursed, and cursed Lot (g); but Philo the Jew (h) speaks better of him, and says that he did not embrace and delight in the iniquities of the inhabitants, though he did not arrive to the perfection of wisdom; and the author of the book of Wisdom calls him the "righteous man",
"When the ungodly perished, she delivered the righteous man, who fled from the fire which fell down upon the five cities.'' (Wisdom 10:6)
as the apostle does here; and very truly, since it follows:
vexed with the filthy conversation of the wicked; the inhabitants of Sodom, who had no regard to the laws of God or man, or to the law and light of nature; but as worse than brute beasts, lived daily in the commission of unnatural lusts; and therefore their conversation is rightly said to be filthy, and was a grievous burden to righteous Lot: for to a good man, not only his own sins, but the sins of others, whether professors or profane, are a burden, and make him groan under them, being grievously fatigued with them, as this good man was, and weary of life because of them, as Rebekah was, through the daughters of Heth.
(d) Tzeror Hammot, fol. 14. 4. & 16. 4. & 20. 2. (e) Jarchi in Genesis. xiii. 10. (f) Zohar in Genesis. fol. 57. 2. Jarchi in Genesis. xiii. 13. (g) Zohar in Genesis. fol. 56. 1, 2. Tzeror Hammor, fol. 7. 3. & 14. 3. & 20. 2. Bereshit Rabba, sect. 44. fol. 39. 1. (h) De Vita Mosis, l. 2. p. 662.

just--righteous.
filthy conversation--literally, "behavior in licentiousness" (Genesis 19:5).
the wicked--Greek, "lawless": who set at defiance the laws of nature, as well as man and God. The Lord reminds us of Lot's faithfulness, but not of his sin in the cave: so in Rahab's case.