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

2:15 Neither shall he stand that handleth the bow; and he that is swift of foot shall not deliver himself: neither shall he that rideth the horse deliver himself.