Jesus is walking along the shore of the sea of Galilee and is calling out to two fishermen, who are in a boat close to shore and are casting their net into the sea. This is right before the two men leave their boat and net to follow Jesus.
18 While walking by the Sea of Galilee, he saw two brothers, Simon (who is called Peter) and Andrew his brother, casting a net into the sea, for they were fishermen.19 And he said to them, “Follow me, and I will make you fishers of men.”20 Immediately they left their nets and followed him.21 And going on from there he saw two other brothers, James the son of Zebedee and John his brother, in the boat with Zebedee their father, mending their nets, and he called them.22 Immediately they left the boat and their father and followed him.