https://www.btstories.com/call-of-moses/
After Moses married Zipporah, he became a shepherd for his father-in-law, Jethro. Forty years later, when Moses was 80 years old, he led his flock near a particular mountain.
Suddenly, off in the distance, he saw that a bush was on fire, but it wasn’t being consumed. He went closer so he could see it better. When he was near, God called to him from out of the bush. “Moses, Moses.”