Bede the Venerable
Catena Aurea · Markusevangelium 1
Now as he walked by the sea of Galilee, he saw Simon and Andrew his brother casting a net into the sea: for they were fishers. And Jesus said unto them, Come ye after me, and I will make you to become fishers of men. And straightway they forsook their nets, and followed him. And when he had gone a little farther thence, he saw James the son of Zebedee, and John his brother, who also were in the ship mending their nets. And straightway he called them: and they left their father Zebedee in the ship with the hired servants, and went after him.
(in Marc. i. 6) Now fishers and unlettered men are sent to preach, that the faith of believers might be thought to lie in the power of God, not in eloquence or in learning. It goes on to say, and immediately they left their nets, and followed him.