A person of pure conduct should never even speak with that sinful person, who does not scruple to utter anything or do anything.
यस्यावाच्यं न लोकेऽस्ति नाकार्यं चापि किंचन। वाचं तेन न संदध्याच्छुचिः संश्लिश्कर्मणा॥