118 Here δέ (de) has not been translated.
119 Grk “he”; the referent (Jesus) has been specified in the translation for clarity.
120 The words “his hands” are not in the Greek text, but have been supplied for clarity. Washing before meals was a cultural practice that was described in the OT, but not prescribed there (Gen 18:4; Judg 19:21). It was apparently related to concern about contracting ceremonial uncleanness (Lev 11:31–38; Demai 2.11–12).

In other versions

The Pharisee was astonished to see that he did not first wash before dinner.

But the Pharisee was surprised when he noticed that Jesus did not first wash before the meal.

When the Pharisee saw this, he was amazed that he did not first perform the ritual washing before dinner.

His host was amazed to see that he sat down to eat without first performing the hand-washing ceremony required by Jewish custom.

And the Pharisee, when he saw it, was astonished that he did not first wash before the meal.

And when the Pharisee saw it, he marvelled that he had not first washed before dinner.

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