Matthew 23:8-11 King James Version (KJV)
8 But be not ye called Rabbi: for one is your Master, even Christ; and all ye are brethren.
9 And call no man your father upon the earth: for one is your Father, which is in heaven.
10 Neither be ye called masters: for one is your Master, even Christ.
11 But he that is greatest among you shall be your servant.