לוּלֵי֙ יְהוָ֣ה צְבָא֔וֹת הוֹתִ֥יר לָ֛נוּ שָׂרִ֖יד כִּמְעָ֑ט כִּסְדֹ֣ם הָיִ֔ינוּ לַעֲמֹרָ֖ה דָּמִֽינוּ׃ (ס)
Except the LORD of hosts Had left unto us a very small remnant, We should have been as Sodom, We should have been like unto Gomorrah.
Rashi on Isaiah
Had not the Lord of Hosts left us a remnant by His own volition and with His mercy, not because of our merits.
Ibn Ezra on Isaiah
Except the Lord of hosts, etc. These are the words of the Israelites, whom the prophet introduces now speaking.
Rashi on Isaiah
we would soon be like Sodom All of us would be destroyed.