Mark 1:5 (WEB) - 5 All the country of Judea and all those of Jerusalem went out to him. They were baptized by him in the Jordan river, confessing their sins.
Mark 1:16 (WEB) - 16 Passing along by the sea of Galilee, he saw Simon and Andrew, the brother of Simon, casting a net into the sea, for they were fishermen.
Mark 1:19 (WEB) - 19 Going on a little further from there, he saw James the son of Zebedee, and John his brother, who were also in the boat mending the nets.