"Walk in" here is a metaphor for "obey." The Pharisees and scribes asked this question to challenge Jesus' authority. This can be written as two statements. Alternate translation: "Your disciples disobey the traditions of our elders! They should wash their hands using our rituals." (See: [[rc://en/ta/man/translate/figs-rquestion]] and [[rc://en/ta/man/translate/figs-metaphor]])