'Profession' in the Bible

Then Amaziah said to Amos, “Go, you seer, run for your life [from Israel] to the land of Judah [your own country] and eat bread and live as a prophet there!

Then Amos replied to Amaziah, “I am not a prophet [by profession], nor am I a prophet’s son; I am a herdsman and a grower of sycamore figs.