The interpretation timeline
Genesis 19:20 Douay-Rheims

There is this city here at hand, to which I may flee, it is a little one, and I shall be saved in it: is it not a little one, and my soul shall live?

A.D. 99 – 1832 4 witnesses

Patristic

before A.D. 750
99
A.D.
Clement of Rome Patristic
d. A.D. 99
“On account of his hospitality and godliness, Lot was saved out of Sodom when all the country round was punished by means of fire and brimstone, the Lord thus making it manifest that He does not forsake those that hope in Him, but gives up such as depart from Him to punishment and torture. [Genesis 19:15-26, 2 Peter 2:6-9] For Lot's wife, who went forth with him, being of a different mind from himself, and not continuing in agreement with him [as to the command which had been given them], was made an example of, so as to be a pillar of salt unto this day. This was done that all might know that those who are of a double mind, and who distrust the power of God, bring down judgment on themselves and become a sign to all succeeding generations.”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
העיר הזאת קרובה THIS CITY IS NEAR — Its settlement as a city is near in point of time — it has been populated quite recently and therefore its measure is not yet filled (Shabbat 10b). And how recent was its settlement? It dated from the generation of the Dispersal of Nations, when mankind was scattered and men began to settle down each in his own place. This took place in the year when Peleg died, and from that time until now was fifty-two years, because Peleg died when Abraham was 48 years old. How is this? Peleg lived after he begat Reu 209 years (11:19): deduct from this number the 32 years that Reu was old when Serug was born (v. 22) and the 30 from the birth of Serug until the birth of Nahor (v. 22) giving 62, and from the birth of Nahor until Terah was born (v. 24) 29, giving 91, and from then until Abraham’s birth 70, giving a total of 161. Add 48 years of Abraham’s life and you have the 209. That was the year of the Dispersion. When Sodom was destroyed Abraham was 99 years old, so that from the Generation of the Dispersal (in the 48th year of Abraham’s life) until this time was 52 years. The colonisation of Zoar took place one year later than that of Sodom and its sister cities. To this fact reference is made in the words אמלטה נא “let me escape נא” i.e. let me escape to the city which is (נ''א (51 in numerical value. הלא מצער הוא IS IT NOT SMALL?— Are not its sins but few, so that you can let it alone. ותחי נפשי SO THAT MY SOUL MAY LIVE? This is the Midrashic explanation (Shabbat 10b). The real meaning of the verse is: It is a small city with few inhabitants; you therefore need not be particular about leaving it alone, so that my soul may live in it.”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“Behold now, this city is near to flee unto,.... Pointing to Bela, afterwards called Zoar, from what follows: it is said to be two miles distant from Sodom (z). But the Jews (a) say it was four miles, and some say (b) five; for they reckon that a man may go five miles from the ascent of the morning (or break of day) till the sun shines out: and it is a little one: a little city, and the houses and buildings in it few, the inhabitants few; and the sins of it few, as the Targum of Jonathan adds, in comparison of Sodom and Gomorrah; and therefore Lot hoped this favour would be granted him, that this city might be saved, and he be allowed to flee to it, and go no further; but others think this refers not to the city, which some say (c) was a large and spacious one, but to his request, that it was a small thing he asked, and hoped therefore it would not be denied, and in which he was very importunate: oh, let me escape thither, (is it not a little one?); or "is it not a little thing" (d)? a small request that I make: and my soul shall live: I shall not only be able to get thither, and so my life will be preserved; but I shall be in good spirits, rejoice and be glad, that I am got safe and out of the reach of danger; my spirits, which are now faint, and therefore can never think of getting so far as to the mountain, but, if this favour is granted me, they will revive, and I shall cheerfully pursue my journey thither, and be comfortable. (z) Bunting's Travels, p. 63. (a) T. Hieros. Beracot, fol. 2, 3. & Gloss. in ib. (b) T. Bab. Pesachim, fol. 94. 1. (c) Bunting's Travels, p. 63. (d) "Nonne perexigua res est?" Junius & Tremellius, Piscator, Cocceius.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“It is a little one - Probably Lot wished to have it for an inheritance, and therefore pleaded its being a little one, that his request might be the more readily granted. Or he might suppose, that being a little city, it was less depraved than Sodom and Gomorrah, and therefore not so ripe for punishment; which was probably the case.”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.