John Mark
Mark 3:7ESV·traditional attribution

Jesus withdrew with his disciples to the sea, and a great crowd followed, from Galilee and Judea

Matthew Henry Presbyterian @wholebiblehenry

Here, as before, we have our Lord Jesus busy at work in the synagogue first, and then by the sea side; to teach us that his presence should not be confined either to the one or to the other, but, wherever any are gathered together in his name, whether in the synagogue or any where else, there is he in the midst of them.

Commenting on Mark 3:1-12

John Gill Reformed Baptist @doctorgill

But Jesus withdrew himself with his disciples to the sea,.... Knowing their evil designs against him, he departed out of the synagogue, and city of Capernaum; and taking his disciples with him, he went to the shore of the sea of Galilee; not out of fear, but because his time was not yet come, and he had more work to do: and a great multitude...

Albert Barnes Presbyterian @notesbybarnes

Verses 7,8. To the sea. The sea of Galilee. Or, to the desert and lonely regions which surrounded the sea, where he might be in obscurity, and avoid their designs against his life. His time had not yet come, and he prudently took care of his life; thus showing that we are not needlessly to throw ourselves into danger. Galilee. See . Judea. See . Jerusalem. Jerusalem was in Judaea.