Mark 7:2-4

2 And had seen that some of his disciples took their bread with unclean, that is, unwashed, hands.

3 Now the Pharisees, and all the Jews, do not take food without washing their hands with care, keeping the old rule which has been handed down to them:

4 And when they come from the market-place, they take no food till their hands are washed; and a number of other orders there are, which have been handed down to them to keep--washings of cups and pots and brass vessels.