It was Amos who first brought forward the great and universal truth
that God judges every human being, no matter what the race or color,
according to his or her acts:

"Seek good and not evil,
That ye may live;
Seek God and ye shall live."

It was Amos who first made clear, that God demands of men, above all
things, justice and righteousness:

"Let justice roll down as a flood of water,
And righteousness like a never-failing stream."

We do not know definitely what became of Amos.

One tradition has it that he came to Jerusalem and, while he was
denouncing Uzziah, king of Judah, Uzziah struck him on the forehead
with a piece of glowing iron. As a result of the blow, Amos died while
preaching in the hope of saving his people in Jerusalem, as his father
died while fighting in defense of Jerusalem, in the hope of saving
his country.

The probabilities are, however, that Amos lived peacefully with his
disciples among his sycamore trees near Tekoah, until he had completed
the writing of his speeches and saw to their distribution all over
Israel, believing that there was yet time for the people of Israel to
return to God and to save the nation from the calamity that was
threatening it.