Mark 1:16-20; 2:13-17
As Jesus passed along the Sea of Galilee, he saw Simon and his brother Andrew casting a net into the sea—for they were fishermen. And Jesus said to them, "Follow me and I will make you fish for people." And immediately they left their nets and followed him. As he went a little farther, he saw James son of Zebedee and his brother John, who were in their boat mending the nets. Immediately he called them; and they left their father Zebedee in the boat with the hired men, and followed him...
Jesus went out again beside the sea; the whole crowd gathered around him, and he taught them. As he was walking along, he saw Levi son of Alphaeus sitting at the tax booth, and he said to him, "Follow me." And he got up and followed him.
And as he sat at dinner in Levi's house, many tax collectors and sinners were also sitting with Jesus and his disciples—for there were many who followed him. When the scribes of the Pharisees saw that he was eating with sinners and tax collectors, they said to his disciples, "Why does he eat with tax collectors and sinners?" When Jesus heard this, he said to them, "Those who are well have no need of a physician, but those who are sick; I have come to call not the righteous but sinners."