Mark 7:2

2 and saw some of his disciples eating food with hands that were defiled, that is, unwashed.

Read Mark 7:2 Using Other Translations

And when they saw some of his disciples eat bread with defiled, that is to say, with unwashen, hands, they found fault.
they saw that some of his disciples ate with hands that were defiled, that is, unwashed.
They noticed that some of his disciples failed to follow the Jewish ritual of hand washing before eating.