John Gill Commentary Mark 2:13

"And he went forth again by the sea side; and all the multitude resorted unto him, and he taught them." — Mark 2:13 (ASV)

And he went forth again by the sea side
The sea of Galilee, where he had met with, and called Peter and Andrew, James and John; and not far from which were the solitary place, and the desert places, where he was before he entered into Capernaum:

and all the multitude resorted unto him ;
who had been with him at Peter's house, and about the door, and those who could not get near him:

and he taught them ;
the word of God, the Gospel, and the doctrines of it.