Matthew 23:7-9

Young's Literal Translation

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,