Mark 1:16

1:16 As he went along the Sea of Galilee, he saw Simon and Andrew, Simon’s brother, casting a net into the sea (for they were fishermen).

Mark 1:19

1:19 Going on a little farther, he saw James, the son of Zebedee, and John his brother in their boat mending nets.

Mark 6:17

6:17 For Herod himself had sent men, arrested John, and bound him in prison on account of Herodias, his brother Philip’s wife, because Herod had married her.