Equal punishment overtakes the sinless with the sinful, when these two constantly associate; even as the wet fuel burns with the dry. Therefore friendship should not be established with the sinful.
स्तुल्यो दण्डः स्पृशते मिश्रभावात्। शुष्केणार्दै दह्यते मिश्रभावात् तस्मात् पापैः सह सन्धिं न कुर्यात्॥