Matthew 23:4-8

And they tie up heavy burdens and lay them on people’s shoulders, but they themselves are unwilling to move them with so much as their finger.

And they do all their deeds to be noticed by other people; for they broaden their phylacteries and lengthen the tassels of their garments.

And they love the place of honor at banquets, and the seats of honor in the synagogues,

and personal greetings in the marketplaces, and being called Rabbi by the people.

But as for you, do not be called Rabbi; for only One is your Teacher, and you are all brothers and sisters.