When Jesus leaves the house, he calls Levi, the Jewish tax collector, to follow him. Jesus annoys the Pharisees and scribes because he attends a big meal that Levi prepares for him.
The phrase "these things" refers to what happened in the previous verses. This signals a new event. (See: [[rc://en/ta/man/translate/writing-newevent]])
To "follow" someone is to become that person's disciple. Alternate translation: "Be my disciple" or "Come, follow me as your teacher" (See: [[rc://en/ta/man/translate/figs-idiom]])