Mark 3:7-15 ESV

Jesus withdrew with his disciples to the sea, and a great crowd followed, from Galilee and Judea and Jerusalem and Idumea and from beyond the Jordan and from around Tyre and Sidon. When the great crowd heard all that he was doing, they came to him. And he told his disciples to have a boat ready for him because of the crowd, lest they crush him, for he had healed many, so that all who had diseases pressed around him to touch him. And whenever the unclean spirits saw him, they fell down before him and cried out, "You are the Son of God." And he strictly ordered them not to make him known. And he went up on the mountain and called to him those whom he desired, and they came to him. And he appointed twelve (whom he also named apostles) so that they might be with him and he might send them out to preach and have authority to cast out demons.