Easton's Bible Dictionary (1897)
(Mark 7:1-9). The Jews, like other Orientals, used their fingers when taking food, and therefore washed their hands before doing so, for the sake of cleanliness. ’” To neglect to do this had come to be regarded as a great sin, a sin equal to the breach of any of the ten commandments. Moses had commanded washings oft, but always for some definite cause; but the Jews multiplied the legal observance till they formed a large body of precepts. To such precepts about ceremonial washing Mark here refers.