Mark 7:3-4
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3For the Pharisees, and all the Jews, except they wash their hands oft, eat not, holding the tradition of the elders. 4And when they come from the market, except they wash, they eat not. And many other things there be, which they have received to hold, as the washing of cups, and pots, brasen vessels, and of tables.
Mark 7:3-4 (KJV)