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3(For the Pharisees and all the other Jews do not eat unless they carefully wash their hands, thereby holding firmly to the tradition of the elders;
4and when they come from the marketplace, they do not eat unless they completely cleanse themselves; and there are many other things which they have received as traditions to firmly hold, such as the washing of cups, pitchers, and copper pots.)
Mark 7:3-4 (NASB)