Amos

Amos said that God always warned His people through a prophet before He passed judgement upon them.

Amos 3:6-8
"Shall a trumpet be blown in the city, and the people not be afraid?
shall there be evil in a city, and the Lord hath not done it?
Surely the Lord God will do nothing,
but he revealeth his secret unto his servants the prophets.
The lion hath roared, who will not fear?
the Lord God hath spoken, who can but prophesy?"

Amos was condemning those who get rich by oppressing the poor.

Amos 4:1-2
"Hear this word, ye kine* of Bashan,
that are in the mountain of Samaria,
which oppress the poor, which crush the needy,
which say to their masters, Bring, and let us drink.
The Lord God hath sworn by his holiness,
that, lo, the days shall come upon you,
that he will take you away with hooks,
and your posterity with fishhooks."

*The word 'kine' is an old fashioned term for 'cattle'

Amos spoke of the corruption which denied poor people justice.

Amos 5:12
"For I know your manifold transgressions
and your mighty sins:
they afflict the just, they take a bribe,
and they turn aside the poor in the gate from their right"

Amos begged God not to send the plague of locusts, and God relented.

Amos 7:1-3
"Thus hath the Lord God shewed unto me; and, behold, he formed grasshoppers in the beginning of the shooting up of the latter growth; and, lo, it was the latter growth after the king’s mowings. And it came to pass, that when they had made an end of eating the grass of the land, then I said, O Lord God, forgive, I beseech thee: by whom shall Jacob arise? for he is small. The Lord repented for this: It shall not be, saith the Lord"

Once again, God relented and spared Israel from this punishment.

Amos 7:4-6
"Thus hath the Lord God shewed unto me: and, behold, the Lord God called to contend by fire, and it devoured the great deep, and did eat up a part. Then said I, O Lord God, cease, I beseech thee: by whom shall Jacob arise? for he is small. The Lord repented for this: This also shall not be, saith the Lord God"

God was showing Amos that there would be no more pity. God would measure the people and if found wanting He would punish them.

Amos 7:7-9
"Thus he shewed me: and, behold, the Lord stood upon a wall made by a plumbline, with a plumbline in his hand. And the Lord said unto me, Amos, what seest thou? And I said, A plumbline. Then said the Lord, Behold, I will set a plumbline in the midst of my people Israel: I will not again pass by them any more: and the high places of Isaac shall be desolate, and the sanctuaries of Israel shall be laid waste; and I will rise against the house of Jeroboam with the sword"

Amos 7:14-15
"Then answered Amos, and said to Amaziah, I was no prophet, neither was I a prophet’s son; but I was an herdman, and a gatherer of sycomore fruit: and the Lord took me as I followed the flock, and the Lord said unto me, Go, prophesy unto my people Israel."

The sycamore fruit is a type of fig

God was talking about the day when He would turn His back on the Kingdom of Judah.

Amos 8:11-12
"Behold, the days come, saith the Lord God,
that I will send a famine in the land,
not a famine of bread, nor a thirst for water,
but of hearing the words of the Lord:
and they shall wander from sea to sea,
and from the north even to the east,
they shall run to and fro to seek the word of the Lord,
and shall not find it"

God will sift out the good people from the sinners, protecting them whilst the evil doers are punished.

Amos 9:9-10
"For, lo, I will command,
and I will sift the house of Israel among all nations,
like as corn is sifted in a sieve,
yet shall not the least grain fall upon the earth.
All the sinners of my people shall die by the sword,
which say, The evil shall not overtake nor prevent us"

God describes a land where the harvest lasts a long time; barely ending before it is time to sow once more. The people of Israel shall return to their homes and rebuild their cities.

Amos 9:13-15
"Behold, the days come, saith the Lord,
that the plowman shall overtake the reaper,
and the treader of grapes him that soweth seed;
and the mountains shall drop sweet wine,
and all the hills shall melt.
And I will bring again the captivity of my people of Israel,
and they shall build the waste cities, and inhabit them;
and they shall plant vineyards, and drink the wine thereof;
they shall also make gardens, and eat the fruit of them.
And I will plant them upon their land,
and they shall no more be pulled up
out of their land which I have given them,
saith the Lord thy God"