And when the Pharisee saw it, he marveled that he had not first washed before dinner.
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Cornelius a Lapide
AD 1637
And when the Pharisee saw it, he marvelled that He had not first washed. For the Pharisees were accustomed, before they sat down to meat, to wash not their hands only, but their arms as far as the elbow. See St. Matthew 15:1.
Washed There was nothing ordained by the law concerning this washing of the hands, which the Pharisees observed before taking meat. Christ and his apostles washed their hands when they pleased, without looking for any mystery in such things, or making to themselves vain obligations in frivolous and indifferent things. They did not neglect what was ordained by the law in certain cases for purification; but beside that, they observed nothing more. (Calmet)