Matthew 23:3-5

so practice and observe everything they tell you, but do not do as they do; for they preach [things],but do not practice them. The scribes and Pharisees tie up heavy loads [that are hard to bear] and place them on men’s shoulders, but they themselves will not lift a finger [to make them lighter]. They do all their deeds to be seen by men; for they make their phylacteries (tefillin) wide [to make them more conspicuous]and make their tassels long. [Ex 13:9; Num 15:38; Deut 6:8]