John Gill Commentary Amos 4:11

"I have overthrown [cities] among you, as when God overthrew Sodom and Gomorrah, and ye were as a brand plucked out of the burning: yet have ye not returned unto me, saith Jehovah." — Amos 4:11 (ASV)

I have overthrown [some] of you, as God overthrew Sodom and
Gomorrah
Either their houses were burnt, or their bodies consumed by fire from heaven, with lightning; not whole cities, but the habitations of some particular persons, or they themselves.

and you were as a firebrand plucked out of the burning ;
some escaped such an awful calamity, their houses were not consumed, while others were; and their persons were safe, while others, just by them, were struck dead at once.

yet have you not returned unto me, says the Lord ;
neither the judgments of God on themselves and others had any effect upon them to humble and reclaim them.

Such dispensations, without the grace of God is exerted, rather harden than soften; and, instead of bringing men to repentance, cause them to blaspheme; see (Revelation 16:8–11) ; nor will the mercy and goodness of God, which should lead persons to repentance, attain that end, unless accompanied with the Spirit and grace of God; who, notwithstanding such mercies and deliverances, will remain senseless, stupid obdurate, and impenitent; see (Revelation 9:20Revelation 9:21) .