Luke 11:38

And when the Pharisee observed this, he was surprised that Jesus had not first washed himself ceremonially before the meal.

"Why do your disciples violate the tradition of the [Jewish] elders? For they do not [ceremonially] wash their hands before eating [their meals]."

They had observed some of His disciples eating their food with contaminated, that is, [ceremonially] unwashed hands.

[About then] a dispute arose between John's disciples and a Jew over ceremonial cleansing.

Treasury of Scripture Knowledge

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

"Why do your disciples violate the tradition of the [Jewish] elders? For they do not [ceremonially] wash their hands before eating [their meals]."

They had observed some of His disciples eating their food with contaminated, that is, [ceremonially] unwashed hands.

[About then] a dispute arose between John's disciples and a Jew over ceremonial cleansing.