Genesis 18:26

Gen 18:26 And the LORD said, If I find in Sodom fifty righteous within the city, then I will spare all the place for their sakes.

Ver. 26. If I find fifty righteous.] The saints are the salt of the earth, that keep the rest from rotting and putrifying.

John Trapp, A Commentary or Exposition upon All the Books of the Old and New Testament (1647–1656) — public domain. Text from a community e-Sword module.

God declareth that his judgments were done with great mercy, forasmuch as all were so corrupt, that not only fifty but ten righteous men could not be found there, and also that the wicked are spared for the righteous’ sake.

Geneva Bible (1599) marginal notes — public domain. Text via Bolls.life.

If I find in Sodom fifty righteous within the city,.... Sodom is particularly mentioned because Lot dwelt there, and being the metropolis, and the city of greatest note, as Jarchi observes, it is put for the rest; and the sense is, if fifty righteous persons could be found in all the five cities, mercy should be shown them:

then will I spare all the place for their sakes; not Sodom only, but the whole country, of which Sodom was the chief; the Lord takes up and agrees to the number Abraham pitched upon, and grants the request he makes.

John Gill's Exposition of the Whole Bible (1746–1763) — public domain (CC PDM 1.0). Text via the HelloAO Bible API.

And the Lord said, If I find in Sodom fifty righteous within the city (thus accepting the test proposed by Abraham, but not necessarily thereby acquiescing in the absolute soundness of his logic), then I will spare (not as an act of justice, but as an exercise of mercy, and not because of any suspicions that might otherwise attach to my rectitude, but solely in vindication of my clemency) all the place (not the righteous merely, which was all that justice could have legitimately demanded) for their sakes, i.e. because of the claims upon my mercy which grace admits the righteous to prefer.

The Pulpit Commentary (1880–1919), ed. H.D.M. Spence-Jones & Joseph S. Exell — public domain. Text from a community e-Sword module.

אם אמצא בסדום וגו' לכל המקום IF I FIND IN SODOM … FORGIVE ALL THE PLACE — all the cities, but because Sodom was the capital city of the district and the most important of all, Scripture subordinates the order cities to it.

Rashi on the Tanakh — English translations: “The Judaica Press complete Tanach with Rashi, translated by A. J. Rosenberg” (CC BY 4.0); “Pentateuch with Rashi's commentary by M. Rosenbaum and A.M. Silbermann, 1929-1934” (public domain); “The Metsudah Tanach series, Lakewood, N.J” (CC BY 4.0); and “The Book of Joshua, Metsudah Publications, 1997” (CC BY 4.0). Text via Sefaria.

WITHIN THE CITY. Rabbi Abraham ibn Ezra explained that [these men for whose sake the cities were to be saved] fear G-d publicly. In a similar sense is the verse: Run ye to and fro through the streets of Jerusalem..The correct interpretation appears to me to be that Abraham said, within the city, meaning that even if they are strangers therein, it is fitting that they save it. He said this on account of Lot, and he thought that perhaps there are others there.

Ramban (Nachmanides) on the Tanakh — English translation: “Commentary on the Torah by Ramban (Nachmanides). Translated and annotated by Charles B. Chavel. New York, Shilo Pub. House, 1971-1976” (CC BY 4.0). Text via Sefaria.

ויאמר ה'...לכל המקום, the city and her satellites, and I will not destroy them.

Radak on the Tanakh — English translations: “Sefaria Community Translation” (CC0 1.0 (public-domain dedication)); “Eliyahu Munk, HaChut Hameshulash” (CC BY 4.0); “Rabbi Mike Feuer, Jerusalem Anthology” (CC BY 4.0); and “R. David Kimhi on the first book of Psalms, Translated by R.G. Finch, London, 1919” (public domain). Text via Sefaria.

Within the city. That is, they display their fear of Heaven openly.

Ibn Ezra on the Tanakh — English translations: “Sefaria Community Translation” (CC0 1.0 (public-domain dedication)); “Yalkut, Sifsei Chachomim Chumash, Metsudah Publications, 2009” (CC BY 4.0); and “Commentary of Ibn Ezra on Isaiah - trans. by M. Friedlander, 1873” (public domain). Text via Sefaria.