Matthew 23:6-10

and love the chief place at feasts, and the chief seats in the synagogues, and the salutations in the marketplaces, and to be called of men, Rabbi. But be not ye called Rabbi: for one is your teacher, and all ye are brethren. And call no man your father on the earth: for one is your Father, even he who is in heaven. Neither be ye called masters: for one is your master, even the Christ.