Coupled with the commissioning of the Apostles from Mk 6:7-13, it’s Amos 7:12-15:
Amaziah, priest of Bethel, said to Amos,
“Off with you, visionary, flee to the land of Judah!
There earn your bread by prophesying,
but never again prophesy in Bethel;
for it is the king’s sanctuary and a royal temple.”
Amos answered Amaziah, “I was no prophet,
nor have I belonged to a company of prophets;
I was a shepherd and a dresser of sycamores.
The LORD took me from following the flock, and said to me,
Go, prophesy to my people Israel.”
Amos is one of the “Minor Prophets,” a book of only 9 chapters. Most of those are warnings and visions. In chapter 7, the string of messages are interrupted with what the New American Bible subtitles, “Biographical Interlude: Amos and Amaziah.” The priest Amaziah accuses Amos of conspiring against Jeroboam, king of the Northern Kingdom, and accuses him of being a prophet-for-hire.
He’s not a “seer” or a crooked “evangelist” who takes money from the gullible. He’s not the equivalent of a Greek sophist who takes money from the rich to promote people with a message. Amos defends himself merely on the fact that he’s a humble farmer, who’s prophesying simply because God told him to. He makes no profit from being a “prophet,” nor is he a particularly educated person.