Luke 5:27-32 says:
27After this Jesus went out and saw a tax collector sitting in the tax office. His name was Levi. Jesus said to him, "Follow me!" 28Levi got up, left everything, and followed Jesus.29Then Levi gave a big dinner for Jesus. The dinner was at Levi's house. At the table there were many tax collectors and some other people too.30But the Pharisees and those men that taught the law for the Pharisees began to complain to the followers of Jesus, "Why do you eat and drink with tax collectors and other bad people?" 31Jesus answered them, "Healthy people don't need a doctor. It is the sick people that need a doctor. 32I have not come to ask good people to change. I have come to ask bad people to change their hearts and lives!" (Easy-to-Read Version)
King James Version:
27And after these things he went forth, and saw a publican, named Levi, sitting at the receipt of custom: and he said unto him, Follow me. 28And he left all, rose up, and followed him. 29And Levi made him a great feast in his own house: and there was a great company of publicans and of others that sat down with them. 30But their scribes and Pharisees murmured against his disciples, saying, Why do ye eat and drink with publicans and sinners? 31And Jesus answering said unto them, They that are whole need not a physician; but they that are sick. 32I came not to call the righteous, but sinners to repentance.