Amos is the book of the herdsman from Tekoa, a small town in Judah. He receives a direct call from God to prophesy against the unrighteousness of both Judah and Israel. Amos is the first prophet to proclaim that God is the ruler of the whole world.

Amos 2

2:7 That pant after the dust of the earth on the head of the poor, and turn aside the way of the meek: and a man and his father will go in unto the same maid, to profane my holy name: