Walk through Amos, verse by verse, with the great Bible Commentaries of Matthew Henry (1662 - 1714) & Adam Clarke (1760 - 1832)
of (the) burning; and ye turned not again to me, saith the Lord. }Wycliffe's Bible
God had threatened to destroy the whole land with such an overthrow as that of Sodom, Deu. 29:23 . But he began with some particular places first, to give them warning, or perhaps with some particular persons, whose sins went beforehand to judgment.
Others very narrowly escaped: "You were many of you as a firebrand plucked out of the burning,....
4:11
I have overthrown some of you, as God overthrew Sodom and Gomorrah, and ye were as a firebrand plucked out of the burning: yet have ye not returned unto me, saith the LORD.
KJV
{I destroyed you, as God destroyed Sodom and Gomorrah, and ye be made as a brand ravished (out) 
God had threatened to destroy the whole land with such an overthrow as that of Sodom, Deu. 29:23 . But he began with some particular places first, to give them warning, or perhaps with some particular persons, whose sins went beforehand to judgment.
Others very narrowly escaped: "You were many of you as a firebrand plucked out of the burning,....