Matthew 23:10

7 and the salutations in the market-places, and to be called by men, Rabbi, Rabbi.

8 `And ye -- ye may not be called Rabbi, for one is your director -- the Christ, and all ye are brethren;

9 and ye may not call [any] your father on the earth, for one is your Father, who is in the heavens,

10 nor may ye be called directors, for one is your director -- the Christ.

11 And the greater of you shall be your ministrant,

12 and whoever shall exalt himself shall be humbled, and whoever shall humble himself shall be exalted.

13 `Wo to you, Scribes and Pharisees, hypocrites! because ye shut up the reign of the heavens before men, for ye do not go in, nor those going in do ye suffer to enter.