Why eateth and drinketh ... - To eat and drink with others denotes intimacy and familiarity. The Pharisees, by asking this question, accused him of seeking the society of such people, and of being the companion of the wicked. The inference which they would draw was, that he could not be himself righteous, since he delighted in the company of abandoned people.
Related Commentaries of Matthew 9:11
Matthew 9:11
11 And when the Pharisees saw it, they said unto his disciples, Why eateth your Master with publicans and sinners?