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 5

5:14 Seek good, and not evil, that ye may live: and so the LORD, the God of hosts, shall be with you, as ye have spoken.