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

2:2 But I will send a fire upon Moab, and it shall devour the palaces of Kirioth: and Moab shall die with tumult, with shouting, and with the sound of the trumpet: