The interpretation timeline
Genesis 19:21 Douay-Rheims

And he said to him: Behold also in this, I have heard thy prayers, not to destroy the city for which thou hast spoken.

A.D. 99 – 1871 5 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
גם לדבר הזה CONCERNING THIS THING ALSO — Not only will you be saved, but I will also save the whole city for Your sake. הפכי means I OVERTHROW, just as (48:5) “until I come (בואי) , and (16:13) “after I have seen (רואי)” and (Jeremiah 31:19) “whenever I speak (דברי) of him)”.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And he said unto him, see, I have accepted thee concerning this thing also,.... Accepted thy prayer and granted thy request, as well as in other things; shown grace and mercy to thee: or, "have lifted up thy face" (e); alluding to the custom of the eastern countries, where persons, when they come into the presence of their superiors, used to prostrate their faces to the ground; when, as a token of their acceptance of them, and good will to them, they used to order them to be lifted up, or them to lift up their faces, and stand before them: that I will not overthrow this city for the which thou hast spoken; for, though he had not in express words petitioned that the city might be spared, yet he had tacitly done it, insomuch as he had requested he might flee unto it, where he could not have been safe had it been destroyed. (e) "suscepi faciem tuam", Pagninus, Moatanus, Vatablus, Drusius, Piscator.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“See, I have accepted thee - How prevalent is prayer with God! Far from refusing to grant a reasonable petition, he shows himself as if under embarrassment to deny any.”
1871
A.D.
1871
“See, I have accepted thee concerning this . . . also--His request was granted him, the prayer of faith availed, and to convince him, from his own experience, that it would have been best and safest at once to follow implicitly the divine directions.”
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.